Home / 13,137.39-18,130.11-7,472.65

Finding the Fourth Proportional to 13,137.39, 18,130.11 and 7,472.65

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Solution

The fourth proportional to 13,137.39, 18,130.11 and 7,472.65 is: 10,312.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.39 : 18,130.11 = 7,472.65 : x
  2. Step 2: Convert to fraction form
    13,137.39/18,130.11 = 7,472.65/x
  3. Step 3: Cross multiply
    13,137.39x = 18,130.11 × 7,472.65
  4. Step 4: Simplify right side
    13,137.39x = 135,479,966.49
  5. Step 5: Solve for x
    x = 135,479,966.49/13,137.39
  6. Step 6: Final answer
    x = 10,312.55

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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.