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Finding the Fourth Proportional to 25,897.40, 38,865.30 and 17,129.40

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Solution

The fourth proportional to 25,897.40, 38,865.30 and 17,129.40 is: 25,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,897.40 : 38,865.30 = 17,129.40 : x
  2. Step 2: Convert to fraction form
    25,897.40/38,865.30 = 17,129.40/x
  3. Step 3: Cross multiply
    25,897.40x = 38,865.30 × 17,129.40
  4. Step 4: Simplify right side
    25,897.40x = 665,739,269.82
  5. Step 5: Solve for x
    x = 665,739,269.82/25,897.40
  6. Step 6: Final answer
    x = 25,706.80

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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.