Home / 28,305.90-42,431.85-10,531.80

Finding the Fourth Proportional to 28,305.90, 42,431.85 and 10,531.80

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Solution

The fourth proportional to 28,305.90, 42,431.85 and 10,531.80 is: 15,787.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.90 : 42,431.85 = 10,531.80 : x
  2. Step 2: Convert to fraction form
    28,305.90/42,431.85 = 10,531.80/x
  3. Step 3: Cross multiply
    28,305.90x = 42,431.85 × 10,531.80
  4. Step 4: Simplify right side
    28,305.90x = 446,883,757.83
  5. Step 5: Solve for x
    x = 446,883,757.83/28,305.90
  6. Step 6: Final answer
    x = 15,787.65

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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.