Home / 39,438.53-54,427.38-21,535.20

Finding the Fourth Proportional to 39,438.53, 54,427.38 and 21,535.20

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Solution

The fourth proportional to 39,438.53, 54,427.38 and 21,535.20 is: 29,719.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,438.53 : 54,427.38 = 21,535.20 : x
  2. Step 2: Convert to fraction form
    39,438.53/54,427.38 = 21,535.20/x
  3. Step 3: Cross multiply
    39,438.53x = 54,427.38 × 21,535.20
  4. Step 4: Simplify right side
    39,438.53x = 1,172,104,433.02
  5. Step 5: Solve for x
    x = 1,172,104,433.02/39,438.53
  6. Step 6: Final answer
    x = 29,719.78

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Half scale
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Double scale
Find fourth proportional to 39,439.53, 54,428.76 and 21,536.20
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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.