Home / 20,809.90-28,726.68-13,267.18

Finding the Fourth Proportional to 20,809.90, 28,726.68 and 13,267.18

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Solution

The fourth proportional to 20,809.90, 28,726.68 and 13,267.18 is: 18,314.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.90 : 28,726.68 = 13,267.18 : x
  2. Step 2: Convert to fraction form
    20,809.90/28,726.68 = 13,267.18/x
  3. Step 3: Cross multiply
    20,809.90x = 28,726.68 × 13,267.18
  4. Step 4: Simplify right side
    20,809.90x = 381,122,034.36
  5. Step 5: Solve for x
    x = 381,122,034.36/20,809.90
  6. Step 6: Final answer
    x = 18,314.46

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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.