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Finding the Fourth Proportional to 15,635.88, 21,580.56 and 9,263.88

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Solution

The fourth proportional to 15,635.88, 21,580.56 and 9,263.88 is: 12,785.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,635.88 : 21,580.56 = 9,263.88 : x
  2. Step 2: Convert to fraction form
    15,635.88/21,580.56 = 9,263.88/x
  3. Step 3: Cross multiply
    15,635.88x = 21,580.56 × 9,263.88
  4. Step 4: Simplify right side
    15,635.88x = 199,919,718.17
  5. Step 5: Solve for x
    x = 199,919,718.17/15,635.88
  6. Step 6: Final answer
    x = 12,785.96

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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.