Home / 20,800.40-31,200.60-10,432.40

Finding the Fourth Proportional to 20,800.40, 31,200.60 and 10,432.40

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Solution

The fourth proportional to 20,800.40, 31,200.60 and 10,432.40 is: 15,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.40 : 31,200.60 = 10,432.40 : x
  2. Step 2: Convert to fraction form
    20,800.40/31,200.60 = 10,432.40/x
  3. Step 3: Cross multiply
    20,800.40x = 31,200.60 × 10,432.40
  4. Step 4: Simplify right side
    20,800.40x = 325,497,139.44
  5. Step 5: Solve for x
    x = 325,497,139.44/20,800.40
  6. Step 6: Final answer
    x = 15,648.60

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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.