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Finding the Fourth Proportional to 18,272.46, 25,215.96 and 9,888.96

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Solution

The fourth proportional to 18,272.46, 25,215.96 and 9,888.96 is: 13,646.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.46 : 25,215.96 = 9,888.96 : x
  2. Step 2: Convert to fraction form
    18,272.46/25,215.96 = 9,888.96/x
  3. Step 3: Cross multiply
    18,272.46x = 25,215.96 × 9,888.96
  4. Step 4: Simplify right side
    18,272.46x = 249,359,619.80
  5. Step 5: Solve for x
    x = 249,359,619.80/18,272.46
  6. Step 6: Final answer
    x = 13,646.75

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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.