Home / 13,211.52-18,239.77-8,739.10

Finding the Fourth Proportional to 13,211.52, 18,239.77 and 8,739.10

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Solution

The fourth proportional to 13,211.52, 18,239.77 and 8,739.10 is: 12,065.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.52 : 18,239.77 = 8,739.10 : x
  2. Step 2: Convert to fraction form
    13,211.52/18,239.77 = 8,739.10/x
  3. Step 3: Cross multiply
    13,211.52x = 18,239.77 × 8,739.10
  4. Step 4: Simplify right side
    13,211.52x = 159,399,207.73
  5. Step 5: Solve for x
    x = 159,399,207.73/13,211.52
  6. Step 6: Final answer
    x = 12,065.17

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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.