Home / 3,138.24-4,331.55-1,812.76

Finding the Fourth Proportional to 3,138.24, 4,331.55 and 1,812.76

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Solution

The fourth proportional to 3,138.24, 4,331.55 and 1,812.76 is: 2,502.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.24 : 4,331.55 = 1,812.76 : x
  2. Step 2: Convert to fraction form
    3,138.24/4,331.55 = 1,812.76/x
  3. Step 3: Cross multiply
    3,138.24x = 4,331.55 × 1,812.76
  4. Step 4: Simplify right side
    3,138.24x = 7,852,060.58
  5. Step 5: Solve for x
    x = 7,852,060.58/3,138.24
  6. Step 6: Final answer
    x = 2,502.06

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Half scale
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Double scale
Find fourth proportional to 3,139.24, 4,332.93 and 1,813.76
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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.