Home / 20,432.60-28,195.26-11,479.40

Finding the Fourth Proportional to 20,432.60, 28,195.26 and 11,479.40

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Solution

The fourth proportional to 20,432.60, 28,195.26 and 11,479.40 is: 15,840.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,432.60 : 28,195.26 = 11,479.40 : x
  2. Step 2: Convert to fraction form
    20,432.60/28,195.26 = 11,479.40/x
  3. Step 3: Cross multiply
    20,432.60x = 28,195.26 × 11,479.40
  4. Step 4: Simplify right side
    20,432.60x = 323,664,667.64
  5. Step 5: Solve for x
    x = 323,664,667.64/20,432.60
  6. Step 6: Final answer
    x = 15,840.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.