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Finding the Fourth Proportional to 18,903.68, 28,387.92 and 18,281.60

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Solution

The fourth proportional to 18,903.68, 28,387.92 and 18,281.60 is: 27,453.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.68 : 28,387.92 = 18,281.60 : x
  2. Step 2: Convert to fraction form
    18,903.68/28,387.92 = 18,281.60/x
  3. Step 3: Cross multiply
    18,903.68x = 28,387.92 × 18,281.60
  4. Step 4: Simplify right side
    18,903.68x = 518,976,598.27
  5. Step 5: Solve for x
    x = 518,976,598.27/18,903.68
  6. Step 6: Final answer
    x = 27,453.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.