Home / 28,631.51-42,911.91-20,761.04

Finding the Fourth Proportional to 28,631.51, 42,911.91 and 20,761.04

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Solution

The fourth proportional to 28,631.51, 42,911.91 and 20,761.04 is: 31,115.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,631.51 : 42,911.91 = 20,761.04 : x
  2. Step 2: Convert to fraction form
    28,631.51/42,911.91 = 20,761.04/x
  3. Step 3: Cross multiply
    28,631.51x = 42,911.91 × 20,761.04
  4. Step 4: Simplify right side
    28,631.51x = 890,895,665.43
  5. Step 5: Solve for x
    x = 890,895,665.43/28,631.51
  6. Step 6: Final answer
    x = 31,115.92

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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.