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Finding the Fourth Proportional to 15,048.74, 20,777.31 and 9,385.76

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Solution

The fourth proportional to 15,048.74, 20,777.31 and 9,385.76 is: 12,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,048.74 : 20,777.31 = 9,385.76 : x
  2. Step 2: Convert to fraction form
    15,048.74/20,777.31 = 9,385.76/x
  3. Step 3: Cross multiply
    15,048.74x = 20,777.31 × 9,385.76
  4. Step 4: Simplify right side
    15,048.74x = 195,010,897.05
  5. Step 5: Solve for x
    x = 195,010,897.05/15,048.74
  6. Step 6: Final answer
    x = 12,958.62

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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.