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Finding the Fourth Proportional to 28,790.70, 39,730.23 and 17,612.70

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Solution

The fourth proportional to 28,790.70, 39,730.23 and 17,612.70 is: 24,304.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,790.70 : 39,730.23 = 17,612.70 : x
  2. Step 2: Convert to fraction form
    28,790.70/39,730.23 = 17,612.70/x
  3. Step 3: Cross multiply
    28,790.70x = 39,730.23 × 17,612.70
  4. Step 4: Simplify right side
    28,790.70x = 699,756,621.92
  5. Step 5: Solve for x
    x = 699,756,621.92/28,790.70
  6. Step 6: Final answer
    x = 24,304.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.