Home / 40,905.70-61,358.55-21,190.30

Finding the Fourth Proportional to 40,905.70, 61,358.55 and 21,190.30

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Solution

The fourth proportional to 40,905.70, 61,358.55 and 21,190.30 is: 31,785.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,905.70 : 61,358.55 = 21,190.30 : x
  2. Step 2: Convert to fraction form
    40,905.70/61,358.55 = 21,190.30/x
  3. Step 3: Cross multiply
    40,905.70x = 61,358.55 × 21,190.30
  4. Step 4: Simplify right side
    40,905.70x = 1,300,206,082.07
  5. Step 5: Solve for x
    x = 1,300,206,082.07/40,905.70
  6. Step 6: Final answer
    x = 31,785.45

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Similar ratio
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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.