Home / 28,043.20-42,055.70-9,318.21

Finding the Fourth Proportional to 28,043.20, 42,055.70 and 9,318.21

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Solution

The fourth proportional to 28,043.20, 42,055.70 and 9,318.21 is: 13,974.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,043.20 : 42,055.70 = 9,318.21 : x
  2. Step 2: Convert to fraction form
    28,043.20/42,055.70 = 9,318.21/x
  3. Step 3: Cross multiply
    28,043.20x = 42,055.70 × 9,318.21
  4. Step 4: Simplify right side
    28,043.20x = 391,883,692.57
  5. Step 5: Solve for x
    x = 391,883,692.57/28,043.20
  6. Step 6: Final answer
    x = 13,974.29

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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.