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Finding the Fourth Proportional to 15,988.70, 22,063.92 and 8,916.32

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Solution

The fourth proportional to 15,988.70, 22,063.92 and 8,916.32 is: 12,304.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,988.70 : 22,063.92 = 8,916.32 : x
  2. Step 2: Convert to fraction form
    15,988.70/22,063.92 = 8,916.32/x
  3. Step 3: Cross multiply
    15,988.70x = 22,063.92 × 8,916.32
  4. Step 4: Simplify right side
    15,988.70x = 196,728,971.17
  5. Step 5: Solve for x
    x = 196,728,971.17/15,988.70
  6. Step 6: Final answer
    x = 12,304.25

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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.