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Finding the Fourth Proportional to 13,051.72, 18,011.08 and 7,385.71

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Solution

The fourth proportional to 13,051.72, 18,011.08 and 7,385.71 is: 10,192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,051.72 : 18,011.08 = 7,385.71 : x
  2. Step 2: Convert to fraction form
    13,051.72/18,011.08 = 7,385.71/x
  3. Step 3: Cross multiply
    13,051.72x = 18,011.08 × 7,385.71
  4. Step 4: Simplify right side
    13,051.72x = 133,024,613.67
  5. Step 5: Solve for x
    x = 133,024,613.67/13,051.72
  6. Step 6: Final answer
    x = 10,192.11

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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.