Home / 15,720.35-21,695.51-9,008.15

Finding the Fourth Proportional to 15,720.35, 21,695.51 and 9,008.15

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Solution

The fourth proportional to 15,720.35, 21,695.51 and 9,008.15 is: 12,432.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.35 : 21,695.51 = 9,008.15 : x
  2. Step 2: Convert to fraction form
    15,720.35/21,695.51 = 9,008.15/x
  3. Step 3: Cross multiply
    15,720.35x = 21,695.51 × 9,008.15
  4. Step 4: Simplify right side
    15,720.35x = 195,436,322.45
  5. Step 5: Solve for x
    x = 195,436,322.45/15,720.35
  6. Step 6: Final answer
    x = 12,432.06

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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.