Home / 3,870.60-5,341.50-2,191.86

Finding the Fourth Proportional to 3,870.60, 5,341.50 and 2,191.86

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Solution

The fourth proportional to 3,870.60, 5,341.50 and 2,191.86 is: 3,024.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.60 : 5,341.50 = 2,191.86 : x
  2. Step 2: Convert to fraction form
    3,870.60/5,341.50 = 2,191.86/x
  3. Step 3: Cross multiply
    3,870.60x = 5,341.50 × 2,191.86
  4. Step 4: Simplify right side
    3,870.60x = 11,707,820.19
  5. Step 5: Solve for x
    x = 11,707,820.19/3,870.60
  6. Step 6: Final answer
    x = 3,024.81

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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.