Home / 8,638.20-11,917.60-5,655.74

Finding the Fourth Proportional to 8,638.20, 11,917.60 and 5,655.74

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Solution

The fourth proportional to 8,638.20, 11,917.60 and 5,655.74 is: 7,802.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.20 : 11,917.60 = 5,655.74 : x
  2. Step 2: Convert to fraction form
    8,638.20/11,917.60 = 5,655.74/x
  3. Step 3: Cross multiply
    8,638.20x = 11,917.60 × 5,655.74
  4. Step 4: Simplify right side
    8,638.20x = 67,402,773.30
  5. Step 5: Solve for x
    x = 67,402,773.30/8,638.20
  6. Step 6: Final answer
    x = 7,802.87

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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.