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Finding the Fourth Proportional to 25,485.90, 38,214 and 9,885.30

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Solution

The fourth proportional to 25,485.90, 38,214 and 9,885.30 is: 14,822.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,485.90 : 38,214 = 9,885.30 : x
  2. Step 2: Convert to fraction form
    25,485.90/38,214 = 9,885.30/x
  3. Step 3: Cross multiply
    25,485.90x = 38,214 × 9,885.30
  4. Step 4: Simplify right side
    25,485.90x = 377,756,854.20
  5. Step 5: Solve for x
    x = 377,756,854.20/25,485.90
  6. Step 6: Final answer
    x = 14,822.19

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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.