Home / 28,115.67-42,172.83-9,140.28

Finding the Fourth Proportional to 28,115.67, 42,172.83 and 9,140.28

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Solution

The fourth proportional to 28,115.67, 42,172.83 and 9,140.28 is: 13,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,115.67 : 42,172.83 = 9,140.28 : x
  2. Step 2: Convert to fraction form
    28,115.67/42,172.83 = 9,140.28/x
  3. Step 3: Cross multiply
    28,115.67x = 42,172.83 × 9,140.28
  4. Step 4: Simplify right side
    28,115.67x = 385,471,474.59
  5. Step 5: Solve for x
    x = 385,471,474.59/28,115.67
  6. Step 6: Final answer
    x = 13,710.20

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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.