Home / 8,420.88-11,617.80-5,017.20

Finding the Fourth Proportional to 8,420.88, 11,617.80 and 5,017.20

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Solution

The fourth proportional to 8,420.88, 11,617.80 and 5,017.20 is: 6,921.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.88 : 11,617.80 = 5,017.20 : x
  2. Step 2: Convert to fraction form
    8,420.88/11,617.80 = 5,017.20/x
  3. Step 3: Cross multiply
    8,420.88x = 11,617.80 × 5,017.20
  4. Step 4: Simplify right side
    8,420.88x = 58,288,826.16
  5. Step 5: Solve for x
    x = 58,288,826.16/8,420.88
  6. Step 6: Final answer
    x = 6,921.94

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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.