Home / 13,439.76-20,159.88-5,123.64

Finding the Fourth Proportional to 13,439.76, 20,159.88 and 5,123.64

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Solution

The fourth proportional to 13,439.76, 20,159.88 and 5,123.64 is: 7,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.76 : 20,159.88 = 5,123.64 : x
  2. Step 2: Convert to fraction form
    13,439.76/20,159.88 = 5,123.64/x
  3. Step 3: Cross multiply
    13,439.76x = 20,159.88 × 5,123.64
  4. Step 4: Simplify right side
    13,439.76x = 103,291,967.56
  5. Step 5: Solve for x
    x = 103,291,967.56/13,439.76
  6. Step 6: Final answer
    x = 7,685.55

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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.