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Finding the Fourth Proportional to 14,592.76, 20,139.92 and 8,220.58

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Solution

The fourth proportional to 14,592.76, 20,139.92 and 8,220.58 is: 11,345.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,592.76 : 20,139.92 = 8,220.58 : x
  2. Step 2: Convert to fraction form
    14,592.76/20,139.92 = 8,220.58/x
  3. Step 3: Cross multiply
    14,592.76x = 20,139.92 × 8,220.58
  4. Step 4: Simplify right side
    14,592.76x = 165,561,823.55
  5. Step 5: Solve for x
    x = 165,561,823.55/14,592.76
  6. Step 6: Final answer
    x = 11,345.48

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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.