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Finding the Fourth Proportional to 28,574.87, 42,878.50 and 15,426.95

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Solution

The fourth proportional to 28,574.87, 42,878.50 and 15,426.95 is: 23,149.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,574.87 : 42,878.50 = 15,426.95 : x
  2. Step 2: Convert to fraction form
    28,574.87/42,878.50 = 15,426.95/x
  3. Step 3: Cross multiply
    28,574.87x = 42,878.50 × 15,426.95
  4. Step 4: Simplify right side
    28,574.87x = 661,484,222.62
  5. Step 5: Solve for x
    x = 661,484,222.62/28,574.87
  6. Step 6: Final answer
    x = 23,149.16

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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.