Home / 9,985.20-13,779.27-5,508.78

Finding the Fourth Proportional to 9,985.20, 13,779.27 and 5,508.78

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Solution

The fourth proportional to 9,985.20, 13,779.27 and 5,508.78 is: 7,601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,985.20 : 13,779.27 = 5,508.78 : x
  2. Step 2: Convert to fraction form
    9,985.20/13,779.27 = 5,508.78/x
  3. Step 3: Cross multiply
    9,985.20x = 13,779.27 × 5,508.78
  4. Step 4: Simplify right side
    9,985.20x = 75,906,966.99
  5. Step 5: Solve for x
    x = 75,906,966.99/9,985.20
  6. Step 6: Final answer
    x = 7,601.95

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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.