Home / 13,439.40-20,115.90-10,501.80

Finding the Fourth Proportional to 13,439.40, 20,115.90 and 10,501.80

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Solution

The fourth proportional to 13,439.40, 20,115.90 and 10,501.80 is: 15,718.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.40 : 20,115.90 = 10,501.80 : x
  2. Step 2: Convert to fraction form
    13,439.40/20,115.90 = 10,501.80/x
  3. Step 3: Cross multiply
    13,439.40x = 20,115.90 × 10,501.80
  4. Step 4: Simplify right side
    13,439.40x = 211,253,158.62
  5. Step 5: Solve for x
    x = 211,253,158.62/13,439.40
  6. Step 6: Final answer
    x = 15,718.94

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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.