Home / 3,129.59-4,318.53-1,870.39

Finding the Fourth Proportional to 3,129.59, 4,318.53 and 1,870.39

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Solution

The fourth proportional to 3,129.59, 4,318.53 and 1,870.39 is: 2,580.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.59 : 4,318.53 = 1,870.39 : x
  2. Step 2: Convert to fraction form
    3,129.59/4,318.53 = 1,870.39/x
  3. Step 3: Cross multiply
    3,129.59x = 4,318.53 × 1,870.39
  4. Step 4: Simplify right side
    3,129.59x = 8,077,335.33
  5. Step 5: Solve for x
    x = 8,077,335.33/3,129.59
  6. Step 6: Final answer
    x = 2,580.96

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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.