Home / 2,124.10-3,186.15-1,432.90

Finding the Fourth Proportional to 2,124.10, 3,186.15 and 1,432.90

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Solution

The fourth proportional to 2,124.10, 3,186.15 and 1,432.90 is: 2,149.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.10 : 3,186.15 = 1,432.90 : x
  2. Step 2: Convert to fraction form
    2,124.10/3,186.15 = 1,432.90/x
  3. Step 3: Cross multiply
    2,124.10x = 3,186.15 × 1,432.90
  4. Step 4: Simplify right side
    2,124.10x = 4,565,434.34
  5. Step 5: Solve for x
    x = 4,565,434.34/2,124.10
  6. Step 6: Final answer
    x = 2,149.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.