Home / 11,139.30-15,372.69-6,103.95

Finding the Fourth Proportional to 11,139.30, 15,372.69 and 6,103.95

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Solution

The fourth proportional to 11,139.30, 15,372.69 and 6,103.95 is: 8,423.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.30 : 15,372.69 = 6,103.95 : x
  2. Step 2: Convert to fraction form
    11,139.30/15,372.69 = 6,103.95/x
  3. Step 3: Cross multiply
    11,139.30x = 15,372.69 × 6,103.95
  4. Step 4: Simplify right side
    11,139.30x = 93,834,131.13
  5. Step 5: Solve for x
    x = 93,834,131.13/11,139.30
  6. Step 6: Final answer
    x = 8,423.70

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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.