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Finding the Fourth Proportional to 20,370.67, 30,510.84 and 15,655.96

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Solution

The fourth proportional to 20,370.67, 30,510.84 and 15,655.96 is: 23,449.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.67 : 30,510.84 = 15,655.96 : x
  2. Step 2: Convert to fraction form
    20,370.67/30,510.84 = 15,655.96/x
  3. Step 3: Cross multiply
    20,370.67x = 30,510.84 × 15,655.96
  4. Step 4: Simplify right side
    20,370.67x = 477,676,490.61
  5. Step 5: Solve for x
    x = 477,676,490.61/20,370.67
  6. Step 6: Final answer
    x = 23,449.23

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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.