Home / 13,221.90-18,236.70-8,501.68

Finding the Fourth Proportional to 13,221.90, 18,236.70 and 8,501.68

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Solution

The fourth proportional to 13,221.90, 18,236.70 and 8,501.68 is: 11,726.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,221.90 : 18,236.70 = 8,501.68 : x
  2. Step 2: Convert to fraction form
    13,221.90/18,236.70 = 8,501.68/x
  3. Step 3: Cross multiply
    13,221.90x = 18,236.70 × 8,501.68
  4. Step 4: Simplify right side
    13,221.90x = 155,042,587.66
  5. Step 5: Solve for x
    x = 155,042,587.66/13,221.90
  6. Step 6: Final answer
    x = 11,726.20

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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.