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Finding the Fourth Proportional to 13,385.70, 18,472.39 and 7,417.49

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Solution

The fourth proportional to 13,385.70, 18,472.39 and 7,417.49 is: 10,236.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.70 : 18,472.39 = 7,417.49 : x
  2. Step 2: Convert to fraction form
    13,385.70/18,472.39 = 7,417.49/x
  3. Step 3: Cross multiply
    13,385.70x = 18,472.39 × 7,417.49
  4. Step 4: Simplify right side
    13,385.70x = 137,018,768.10
  5. Step 5: Solve for x
    x = 137,018,768.10/13,385.70
  6. Step 6: Final answer
    x = 10,236.20

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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.