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Finding the Fourth Proportional to 28,319.40, 42,527.70 and 20,057.40

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Solution

The fourth proportional to 28,319.40, 42,527.70 and 20,057.40 is: 30,120.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,319.40 : 42,527.70 = 20,057.40 : x
  2. Step 2: Convert to fraction form
    28,319.40/42,527.70 = 20,057.40/x
  3. Step 3: Cross multiply
    28,319.40x = 42,527.70 × 20,057.40
  4. Step 4: Simplify right side
    28,319.40x = 852,995,089.98
  5. Step 5: Solve for x
    x = 852,995,089.98/28,319.40
  6. Step 6: Final answer
    x = 30,120.52

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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.