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Finding the Fourth Proportional to 13,385.79, 18,472.11 and 7,417.44

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Solution

The fourth proportional to 13,385.79, 18,472.11 and 7,417.44 is: 10,235.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.79 : 18,472.11 = 7,417.44 : x
  2. Step 2: Convert to fraction form
    13,385.79/18,472.11 = 7,417.44/x
  3. Step 3: Cross multiply
    13,385.79x = 18,472.11 × 7,417.44
  4. Step 4: Simplify right side
    13,385.79x = 137,015,767.60
  5. Step 5: Solve for x
    x = 137,015,767.60/13,385.79
  6. Step 6: Final answer
    x = 10,235.91

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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.