Home / 20,927.06-28,867.29-12,538.70

Finding the Fourth Proportional to 20,927.06, 28,867.29 and 12,538.70

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Solution

The fourth proportional to 20,927.06, 28,867.29 and 12,538.70 is: 17,296.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,927.06 : 28,867.29 = 12,538.70 : x
  2. Step 2: Convert to fraction form
    20,927.06/28,867.29 = 12,538.70/x
  3. Step 3: Cross multiply
    20,927.06x = 28,867.29 × 12,538.70
  4. Step 4: Simplify right side
    20,927.06x = 361,958,289.12
  5. Step 5: Solve for x
    x = 361,958,289.12/20,927.06
  6. Step 6: Final answer
    x = 17,296.18

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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.