Home / 39,045.36-53,882.10-21,139.96

Finding the Fourth Proportional to 39,045.36, 53,882.10 and 21,139.96

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Solution

The fourth proportional to 39,045.36, 53,882.10 and 21,139.96 is: 29,172.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,045.36 : 53,882.10 = 21,139.96 : x
  2. Step 2: Convert to fraction form
    39,045.36/53,882.10 = 21,139.96/x
  3. Step 3: Cross multiply
    39,045.36x = 53,882.10 × 21,139.96
  4. Step 4: Simplify right side
    39,045.36x = 1,139,065,438.72
  5. Step 5: Solve for x
    x = 1,139,065,438.72/39,045.36
  6. Step 6: Final answer
    x = 29,172.88

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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.