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Finding the Fourth Proportional to 15,663.86, 21,614.88 and 8,948.54

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Solution

The fourth proportional to 15,663.86, 21,614.88 and 8,948.54 is: 12,348.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,663.86 : 21,614.88 = 8,948.54 : x
  2. Step 2: Convert to fraction form
    15,663.86/21,614.88 = 8,948.54/x
  3. Step 3: Cross multiply
    15,663.86x = 21,614.88 × 8,948.54
  4. Step 4: Simplify right side
    15,663.86x = 193,421,618.28
  5. Step 5: Solve for x
    x = 193,421,618.28/15,663.86
  6. Step 6: Final answer
    x = 12,348.27

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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.