Home / 3,129.40-4,318.56-1,693.76

Finding the Fourth Proportional to 3,129.40, 4,318.56 and 1,693.76

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Solution

The fourth proportional to 3,129.40, 4,318.56 and 1,693.76 is: 2,337.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.40 : 4,318.56 = 1,693.76 : x
  2. Step 2: Convert to fraction form
    3,129.40/4,318.56 = 1,693.76/x
  3. Step 3: Cross multiply
    3,129.40x = 4,318.56 × 1,693.76
  4. Step 4: Simplify right side
    3,129.40x = 7,314,574.12
  5. Step 5: Solve for x
    x = 7,314,574.12/3,129.40
  6. Step 6: Final answer
    x = 2,337.38

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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.