Home / 39,171.70-58,740.10-12,512.78

Finding the Fourth Proportional to 39,171.70, 58,740.10 and 12,512.78

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Solution

The fourth proportional to 39,171.70, 58,740.10 and 12,512.78 is: 18,763.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,171.70 : 58,740.10 = 12,512.78 : x
  2. Step 2: Convert to fraction form
    39,171.70/58,740.10 = 12,512.78/x
  3. Step 3: Cross multiply
    39,171.70x = 58,740.10 × 12,512.78
  4. Step 4: Simplify right side
    39,171.70x = 735,001,948.48
  5. Step 5: Solve for x
    x = 735,001,948.48/39,171.70
  6. Step 6: Final answer
    x = 18,763.60

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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.