Home / 28,426.31-42,639.57-8,704.78

Finding the Fourth Proportional to 28,426.31, 42,639.57 and 8,704.78

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Solution

The fourth proportional to 28,426.31, 42,639.57 and 8,704.78 is: 13,057.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,426.31 : 42,639.57 = 8,704.78 : x
  2. Step 2: Convert to fraction form
    28,426.31/42,639.57 = 8,704.78/x
  3. Step 3: Cross multiply
    28,426.31x = 42,639.57 × 8,704.78
  4. Step 4: Simplify right side
    28,426.31x = 371,168,032.62
  5. Step 5: Solve for x
    x = 371,168,032.62/28,426.31
  6. Step 6: Final answer
    x = 13,057.20

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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.