Home / 20,829.32-28,743.72-12,444.20

Finding the Fourth Proportional to 20,829.32, 28,743.72 and 12,444.20

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Solution

The fourth proportional to 20,829.32, 28,743.72 and 12,444.20 is: 17,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.32 : 28,743.72 = 12,444.20 : x
  2. Step 2: Convert to fraction form
    20,829.32/28,743.72 = 12,444.20/x
  3. Step 3: Cross multiply
    20,829.32x = 28,743.72 × 12,444.20
  4. Step 4: Simplify right side
    20,829.32x = 357,692,600.42
  5. Step 5: Solve for x
    x = 357,692,600.42/20,829.32
  6. Step 6: Final answer
    x = 17,172.55

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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.