Home / 13,138.91-18,130.97-7,472.90

Finding the Fourth Proportional to 13,138.91, 18,130.97 and 7,472.90

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Solution

The fourth proportional to 13,138.91, 18,130.97 and 7,472.90 is: 10,312.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.91 : 18,130.97 = 7,472.90 : x
  2. Step 2: Convert to fraction form
    13,138.91/18,130.97 = 7,472.90/x
  3. Step 3: Cross multiply
    13,138.91x = 18,130.97 × 7,472.90
  4. Step 4: Simplify right side
    13,138.91x = 135,490,853.74
  5. Step 5: Solve for x
    x = 135,490,853.74/13,138.91
  6. Step 6: Final answer
    x = 10,312.18

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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.