Home / 20,781.64-28,675.02-19,730.80

Finding the Fourth Proportional to 20,781.64, 28,675.02 and 19,730.80

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Solution

The fourth proportional to 20,781.64, 28,675.02 and 19,730.80 is: 27,225.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.64 : 28,675.02 = 19,730.80 : x
  2. Step 2: Convert to fraction form
    20,781.64/28,675.02 = 19,730.80/x
  3. Step 3: Cross multiply
    20,781.64x = 28,675.02 × 19,730.80
  4. Step 4: Simplify right side
    20,781.64x = 565,781,084.62
  5. Step 5: Solve for x
    x = 565,781,084.62/20,781.64
  6. Step 6: Final answer
    x = 27,225.05

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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.