Home / 13,280.11-18,320.40-8,565.91

Finding the Fourth Proportional to 13,280.11, 18,320.40 and 8,565.91

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Solution

The fourth proportional to 13,280.11, 18,320.40 and 8,565.91 is: 11,816.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.11 : 18,320.40 = 8,565.91 : x
  2. Step 2: Convert to fraction form
    13,280.11/18,320.40 = 8,565.91/x
  3. Step 3: Cross multiply
    13,280.11x = 18,320.40 × 8,565.91
  4. Step 4: Simplify right side
    13,280.11x = 156,930,897.56
  5. Step 5: Solve for x
    x = 156,930,897.56/13,280.11
  6. Step 6: Final answer
    x = 11,816.99

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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.