Home / 20,630.61-28,470.60-11,199.20

Finding the Fourth Proportional to 20,630.61, 28,470.60 and 11,199.20

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Solution

The fourth proportional to 20,630.61, 28,470.60 and 11,199.20 is: 15,455.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.61 : 28,470.60 = 11,199.20 : x
  2. Step 2: Convert to fraction form
    20,630.61/28,470.60 = 11,199.20/x
  3. Step 3: Cross multiply
    20,630.61x = 28,470.60 × 11,199.20
  4. Step 4: Simplify right side
    20,630.61x = 318,847,801.17
  5. Step 5: Solve for x
    x = 318,847,801.17/20,630.61
  6. Step 6: Final answer
    x = 15,455.08

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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.