Home / 13,426.76-20,139.72-6,411.80

Finding the Fourth Proportional to 13,426.76, 20,139.72 and 6,411.80

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Solution

The fourth proportional to 13,426.76, 20,139.72 and 6,411.80 is: 9,617.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,426.76 : 20,139.72 = 6,411.80 : x
  2. Step 2: Convert to fraction form
    13,426.76/20,139.72 = 6,411.80/x
  3. Step 3: Cross multiply
    13,426.76x = 20,139.72 × 6,411.80
  4. Step 4: Simplify right side
    13,426.76x = 129,131,856.70
  5. Step 5: Solve for x
    x = 129,131,856.70/13,426.76
  6. Step 6: Final answer
    x = 9,617.50

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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.