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Finding the Fourth Proportional to 25,978.40, 38,971.20 and 9,334.40

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Solution

The fourth proportional to 25,978.40, 38,971.20 and 9,334.40 is: 14,002.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,978.40 : 38,971.20 = 9,334.40 : x
  2. Step 2: Convert to fraction form
    25,978.40/38,971.20 = 9,334.40/x
  3. Step 3: Cross multiply
    25,978.40x = 38,971.20 × 9,334.40
  4. Step 4: Simplify right side
    25,978.40x = 363,772,769.28
  5. Step 5: Solve for x
    x = 363,772,769.28/25,978.40
  6. Step 6: Final answer
    x = 14,002.89

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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.