Home / 13,140.32-19,711.68-5,240.92

Finding the Fourth Proportional to 13,140.32, 19,711.68 and 5,240.92

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Solution

The fourth proportional to 13,140.32, 19,711.68 and 5,240.92 is: 7,861.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.32 : 19,711.68 = 5,240.92 : x
  2. Step 2: Convert to fraction form
    13,140.32/19,711.68 = 5,240.92/x
  3. Step 3: Cross multiply
    13,140.32x = 19,711.68 × 5,240.92
  4. Step 4: Simplify right side
    13,140.32x = 103,307,337.95
  5. Step 5: Solve for x
    x = 103,307,337.95/13,140.32
  6. Step 6: Final answer
    x = 7,861.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.