Home / 28,748.10-43,122.15-20,972.10

Finding the Fourth Proportional to 28,748.10, 43,122.15 and 20,972.10

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Solution

The fourth proportional to 28,748.10, 43,122.15 and 20,972.10 is: 31,458.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,748.10 : 43,122.15 = 20,972.10 : x
  2. Step 2: Convert to fraction form
    28,748.10/43,122.15 = 20,972.10/x
  3. Step 3: Cross multiply
    28,748.10x = 43,122.15 × 20,972.10
  4. Step 4: Simplify right side
    28,748.10x = 904,362,042.02
  5. Step 5: Solve for x
    x = 904,362,042.02/28,748.10
  6. Step 6: Final answer
    x = 31,458.15

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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.