Home / 15,699.33-21,665.43-8,625.69

Finding the Fourth Proportional to 15,699.33, 21,665.43 and 8,625.69

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Solution

The fourth proportional to 15,699.33, 21,665.43 and 8,625.69 is: 11,903.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.33 : 21,665.43 = 8,625.69 : x
  2. Step 2: Convert to fraction form
    15,699.33/21,665.43 = 8,625.69/x
  3. Step 3: Cross multiply
    15,699.33x = 21,665.43 × 8,625.69
  4. Step 4: Simplify right side
    15,699.33x = 186,879,282.90
  5. Step 5: Solve for x
    x = 186,879,282.90/15,699.33
  6. Step 6: Final answer
    x = 11,903.65

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Half scale
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Double scale
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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.