Home / 39,439.05-54,427.01-21,535.19

Finding the Fourth Proportional to 39,439.05, 54,427.01 and 21,535.19

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Solution

The fourth proportional to 39,439.05, 54,427.01 and 21,535.19 is: 29,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,439.05 : 54,427.01 = 21,535.19 : x
  2. Step 2: Convert to fraction form
    39,439.05/54,427.01 = 21,535.19/x
  3. Step 3: Cross multiply
    39,439.05x = 54,427.01 × 21,535.19
  4. Step 4: Simplify right side
    39,439.05x = 1,172,096,001.48
  5. Step 5: Solve for x
    x = 1,172,096,001.48/39,439.05
  6. Step 6: Final answer
    x = 29,719.17

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Half scale
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Double scale
Find fourth proportional to 39,440.05, 54,428.39 and 21,536.19
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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.