Home / 39,141.72-58,719.10-12,839.40

Finding the Fourth Proportional to 39,141.72, 58,719.10 and 12,839.40

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Solution

The fourth proportional to 39,141.72, 58,719.10 and 12,839.40 is: 19,261.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,141.72 : 58,719.10 = 12,839.40 : x
  2. Step 2: Convert to fraction form
    39,141.72/58,719.10 = 12,839.40/x
  3. Step 3: Cross multiply
    39,141.72x = 58,719.10 × 12,839.40
  4. Step 4: Simplify right side
    39,141.72x = 753,918,012.54
  5. Step 5: Solve for x
    x = 753,918,012.54/39,141.72
  6. Step 6: Final answer
    x = 19,261.24

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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.