Home / 3,117.38-4,301.98-1,720.12

Finding the Fourth Proportional to 3,117.38, 4,301.98 and 1,720.12

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Solution

The fourth proportional to 3,117.38, 4,301.98 and 1,720.12 is: 2,373.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.38 : 4,301.98 = 1,720.12 : x
  2. Step 2: Convert to fraction form
    3,117.38/4,301.98 = 1,720.12/x
  3. Step 3: Cross multiply
    3,117.38x = 4,301.98 × 1,720.12
  4. Step 4: Simplify right side
    3,117.38x = 7,399,921.84
  5. Step 5: Solve for x
    x = 7,399,921.84/3,117.38
  6. Step 6: Final answer
    x = 2,373.76

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Half scale
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Double scale
Find fourth proportional to 3,118.38, 4,303.36 and 1,721.12
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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.