Home / 4,188.48-5,781.15-2,421.20

Finding the Fourth Proportional to 4,188.48, 5,781.15 and 2,421.20

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Solution

The fourth proportional to 4,188.48, 5,781.15 and 2,421.20 is: 3,341.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,188.48 : 5,781.15 = 2,421.20 : x
  2. Step 2: Convert to fraction form
    4,188.48/5,781.15 = 2,421.20/x
  3. Step 3: Cross multiply
    4,188.48x = 5,781.15 × 2,421.20
  4. Step 4: Simplify right side
    4,188.48x = 13,997,291.47
  5. Step 5: Solve for x
    x = 13,997,291.47/4,188.48
  6. Step 6: Final answer
    x = 3,341.85

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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.