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Finding the Fourth Proportional to 18,271.62, 25,214.92 and 9,888.12

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Solution

The fourth proportional to 18,271.62, 25,214.92 and 9,888.12 is: 13,645.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.62 : 25,214.92 = 9,888.12 : x
  2. Step 2: Convert to fraction form
    18,271.62/25,214.92 = 9,888.12/x
  3. Step 3: Cross multiply
    18,271.62x = 25,214.92 × 9,888.12
  4. Step 4: Simplify right side
    18,271.62x = 249,328,154.75
  5. Step 5: Solve for x
    x = 249,328,154.75/18,271.62
  6. Step 6: Final answer
    x = 13,645.65

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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.