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Finding the Fourth Proportional to 15,699.16, 21,663.48 and 8,623.81

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Solution

The fourth proportional to 15,699.16, 21,663.48 and 8,623.81 is: 11,900.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.16 : 21,663.48 = 8,623.81 : x
  2. Step 2: Convert to fraction form
    15,699.16/21,663.48 = 8,623.81/x
  3. Step 3: Cross multiply
    15,699.16x = 21,663.48 × 8,623.81
  4. Step 4: Simplify right side
    15,699.16x = 186,821,735.46
  5. Step 5: Solve for x
    x = 186,821,735.46/15,699.16
  6. Step 6: Final answer
    x = 11,900.11

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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.