Home / 3,139.48-4,331.91-1,812.70

Finding the Fourth Proportional to 3,139.48, 4,331.91 and 1,812.70

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Solution

The fourth proportional to 3,139.48, 4,331.91 and 1,812.70 is: 2,501.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.48 : 4,331.91 = 1,812.70 : x
  2. Step 2: Convert to fraction form
    3,139.48/4,331.91 = 1,812.70/x
  3. Step 3: Cross multiply
    3,139.48x = 4,331.91 × 1,812.70
  4. Step 4: Simplify right side
    3,139.48x = 7,852,453.26
  5. Step 5: Solve for x
    x = 7,852,453.26/3,139.48
  6. Step 6: Final answer
    x = 2,501.20

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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.