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Finding the Fourth Proportional to 15,663.57, 21,615.57 and 8,590.11

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Solution

The fourth proportional to 15,663.57, 21,615.57 and 8,590.11 is: 11,854.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.57 : 21,615.57 = 8,590.11 : x
  2. Step 2: Convert to fraction form
    15,663.57/21,615.57 = 8,590.11/x
  3. Step 3: Cross multiply
    15,663.57x = 21,615.57 × 8,590.11
  4. Step 4: Simplify right side
    15,663.57x = 185,680,124.01
  5. Step 5: Solve for x
    x = 185,680,124.01/15,663.57
  6. Step 6: Final answer
    x = 11,854.27

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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.