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Finding the Fourth Proportional to 14,780.48, 20,394.48 and 8,493.20

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Solution

The fourth proportional to 14,780.48, 20,394.48 and 8,493.20 is: 11,719.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,780.48 : 20,394.48 = 8,493.20 : x
  2. Step 2: Convert to fraction form
    14,780.48/20,394.48 = 8,493.20/x
  3. Step 3: Cross multiply
    14,780.48x = 20,394.48 × 8,493.20
  4. Step 4: Simplify right side
    14,780.48x = 173,214,397.54
  5. Step 5: Solve for x
    x = 173,214,397.54/14,780.48
  6. Step 6: Final answer
    x = 11,719.13

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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.