Home / 15,572.31-21,489.81-8,499.15

Finding the Fourth Proportional to 15,572.31, 21,489.81 and 8,499.15

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Solution

The fourth proportional to 15,572.31, 21,489.81 and 8,499.15 is: 11,728.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.31 : 21,489.81 = 8,499.15 : x
  2. Step 2: Convert to fraction form
    15,572.31/21,489.81 = 8,499.15/x
  3. Step 3: Cross multiply
    15,572.31x = 21,489.81 × 8,499.15
  4. Step 4: Simplify right side
    15,572.31x = 182,645,118.66
  5. Step 5: Solve for x
    x = 182,645,118.66/15,572.31
  6. Step 6: Final answer
    x = 11,728.84

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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.