Home / 18,921.38-28,364.42-6,432.87

Finding the Fourth Proportional to 18,921.38, 28,364.42 and 6,432.87

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Solution

The fourth proportional to 18,921.38, 28,364.42 and 6,432.87 is: 9,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.38 : 28,364.42 = 6,432.87 : x
  2. Step 2: Convert to fraction form
    18,921.38/28,364.42 = 6,432.87/x
  3. Step 3: Cross multiply
    18,921.38x = 28,364.42 × 6,432.87
  4. Step 4: Simplify right side
    18,921.38x = 182,464,626.49
  5. Step 5: Solve for x
    x = 182,464,626.49/18,921.38
  6. Step 6: Final answer
    x = 9,643.30

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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.