Home / 13,612.88-20,422.16-4,847.76

Finding the Fourth Proportional to 13,612.88, 20,422.16 and 4,847.76

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Solution

The fourth proportional to 13,612.88, 20,422.16 and 4,847.76 is: 7,272.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.88 : 20,422.16 = 4,847.76 : x
  2. Step 2: Convert to fraction form
    13,612.88/20,422.16 = 4,847.76/x
  3. Step 3: Cross multiply
    13,612.88x = 20,422.16 × 4,847.76
  4. Step 4: Simplify right side
    13,612.88x = 99,001,730.36
  5. Step 5: Solve for x
    x = 99,001,730.36/13,612.88
  6. Step 6: Final answer
    x = 7,272.65

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1.5x scale

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.