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Finding the Fourth Proportional to 25,890.91, 38,830.05 and 7,170.46

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Solution

The fourth proportional to 25,890.91, 38,830.05 and 7,170.46 is: 10,753.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,890.91 : 38,830.05 = 7,170.46 : x
  2. Step 2: Convert to fraction form
    25,890.91/38,830.05 = 7,170.46/x
  3. Step 3: Cross multiply
    25,890.91x = 38,830.05 × 7,170.46
  4. Step 4: Simplify right side
    25,890.91x = 278,429,223.25
  5. Step 5: Solve for x
    x = 278,429,223.25/25,890.91
  6. Step 6: Final answer
    x = 10,753.94

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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.