Home / 37,123.20-51,229.40-20,990.25

Finding the Fourth Proportional to 37,123.20, 51,229.40 and 20,990.25

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Solution

The fourth proportional to 37,123.20, 51,229.40 and 20,990.25 is: 28,966.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,123.20 : 51,229.40 = 20,990.25 : x
  2. Step 2: Convert to fraction form
    37,123.20/51,229.40 = 20,990.25/x
  3. Step 3: Cross multiply
    37,123.20x = 51,229.40 × 20,990.25
  4. Step 4: Simplify right side
    37,123.20x = 1,075,317,808.40
  5. Step 5: Solve for x
    x = 1,075,317,808.40/37,123.20
  6. Step 6: Final answer
    x = 28,966.19

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.