Home / 3,147.12-4,702.59-2,165.40

Finding the Fourth Proportional to 3,147.12, 4,702.59 and 2,165.40

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Solution

The fourth proportional to 3,147.12, 4,702.59 and 2,165.40 is: 3,235.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.12 : 4,702.59 = 2,165.40 : x
  2. Step 2: Convert to fraction form
    3,147.12/4,702.59 = 2,165.40/x
  3. Step 3: Cross multiply
    3,147.12x = 4,702.59 × 2,165.40
  4. Step 4: Simplify right side
    3,147.12x = 10,182,988.39
  5. Step 5: Solve for x
    x = 10,182,988.39/3,147.12
  6. Step 6: Final answer
    x = 3,235.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.