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Finding the Fourth Proportional to 15,668.72, 21,623.62 and 9,998.92

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Solution

The fourth proportional to 15,668.72, 21,623.62 and 9,998.92 is: 13,799.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,668.72 : 21,623.62 = 9,998.92 : x
  2. Step 2: Convert to fraction form
    15,668.72/21,623.62 = 9,998.92/x
  3. Step 3: Cross multiply
    15,668.72x = 21,623.62 × 9,998.92
  4. Step 4: Simplify right side
    15,668.72x = 216,212,820.52
  5. Step 5: Solve for x
    x = 216,212,820.52/15,668.72
  6. Step 6: Final answer
    x = 13,799.01

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Half scale
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Double scale
Find fourth proportional to 15,669.72, 21,625 and 9,999.92
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.