Home / 20,752.69-28,630.56-12,781.08

Finding the Fourth Proportional to 20,752.69, 28,630.56 and 12,781.08

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Solution

The fourth proportional to 20,752.69, 28,630.56 and 12,781.08 is: 17,632.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.69 : 28,630.56 = 12,781.08 : x
  2. Step 2: Convert to fraction form
    20,752.69/28,630.56 = 12,781.08/x
  3. Step 3: Cross multiply
    20,752.69x = 28,630.56 × 12,781.08
  4. Step 4: Simplify right side
    20,752.69x = 365,929,477.80
  5. Step 5: Solve for x
    x = 365,929,477.80/20,752.69
  6. Step 6: Final answer
    x = 17,632.87

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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.