Home / 15,331.31-21,157.63-8,617.55

Finding the Fourth Proportional to 15,331.31, 21,157.63 and 8,617.55

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Solution

The fourth proportional to 15,331.31, 21,157.63 and 8,617.55 is: 11,892.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.31 : 21,157.63 = 8,617.55 : x
  2. Step 2: Convert to fraction form
    15,331.31/21,157.63 = 8,617.55/x
  3. Step 3: Cross multiply
    15,331.31x = 21,157.63 × 8,617.55
  4. Step 4: Simplify right side
    15,331.31x = 182,326,934.41
  5. Step 5: Solve for x
    x = 182,326,934.41/15,331.31
  6. Step 6: Final answer
    x = 11,892.46

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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.