Home / 20,724.60-28,602-11,772.66

Finding the Fourth Proportional to 20,724.60, 28,602 and 11,772.66

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Solution

The fourth proportional to 20,724.60, 28,602 and 11,772.66 is: 16,247.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.60 : 28,602 = 11,772.66 : x
  2. Step 2: Convert to fraction form
    20,724.60/28,602 = 11,772.66/x
  3. Step 3: Cross multiply
    20,724.60x = 28,602 × 11,772.66
  4. Step 4: Simplify right side
    20,724.60x = 336,721,621.32
  5. Step 5: Solve for x
    x = 336,721,621.32/20,724.60
  6. Step 6: Final answer
    x = 16,247.44

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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.