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Finding the Fourth Proportional to 21,515.52, 32,259.12 and 10,400.16

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Solution

The fourth proportional to 21,515.52, 32,259.12 and 10,400.16 is: 15,593.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,515.52 : 32,259.12 = 10,400.16 : x
  2. Step 2: Convert to fraction form
    21,515.52/32,259.12 = 10,400.16/x
  3. Step 3: Cross multiply
    21,515.52x = 32,259.12 × 10,400.16
  4. Step 4: Simplify right side
    21,515.52x = 335,500,009.46
  5. Step 5: Solve for x
    x = 335,500,009.46/21,515.52
  6. Step 6: Final answer
    x = 15,593.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.