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Finding the Fourth Proportional to 37,122.20, 55,658.70 and 20,490.20

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Solution

The fourth proportional to 37,122.20, 55,658.70 and 20,490.20 is: 30,721.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,122.20 : 55,658.70 = 20,490.20 : x
  2. Step 2: Convert to fraction form
    37,122.20/55,658.70 = 20,490.20/x
  3. Step 3: Cross multiply
    37,122.20x = 55,658.70 × 20,490.20
  4. Step 4: Simplify right side
    37,122.20x = 1,140,457,894.74
  5. Step 5: Solve for x
    x = 1,140,457,894.74/37,122.20
  6. Step 6: Final answer
    x = 30,721.72

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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.