Home / 10,125.64-15,189.72-5,439.20

Finding the Fourth Proportional to 10,125.64, 15,189.72 and 5,439.20

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Solution

The fourth proportional to 10,125.64, 15,189.72 and 5,439.20 is: 8,159.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,125.64 : 15,189.72 = 5,439.20 : x
  2. Step 2: Convert to fraction form
    10,125.64/15,189.72 = 5,439.20/x
  3. Step 3: Cross multiply
    10,125.64x = 15,189.72 × 5,439.20
  4. Step 4: Simplify right side
    10,125.64x = 82,619,925.02
  5. Step 5: Solve for x
    x = 82,619,925.02/10,125.64
  6. Step 6: Final answer
    x = 8,159.48

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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.