Home / 12,779.24-17,620.80-9,001.20

Finding the Fourth Proportional to 12,779.24, 17,620.80 and 9,001.20

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Solution

The fourth proportional to 12,779.24, 17,620.80 and 9,001.20 is: 12,411.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,779.24 : 17,620.80 = 9,001.20 : x
  2. Step 2: Convert to fraction form
    12,779.24/17,620.80 = 9,001.20/x
  3. Step 3: Cross multiply
    12,779.24x = 17,620.80 × 9,001.20
  4. Step 4: Simplify right side
    12,779.24x = 158,608,344.96
  5. Step 5: Solve for x
    x = 158,608,344.96/12,779.24
  6. Step 6: Final answer
    x = 12,411.41

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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.