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Finding the Fourth Proportional to 18,959.76, 26,159.22 and 12,245.68

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Solution

The fourth proportional to 18,959.76, 26,159.22 and 12,245.68 is: 16,895.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.76 : 26,159.22 = 12,245.68 : x
  2. Step 2: Convert to fraction form
    18,959.76/26,159.22 = 12,245.68/x
  3. Step 3: Cross multiply
    18,959.76x = 26,159.22 × 12,245.68
  4. Step 4: Simplify right side
    18,959.76x = 320,337,437.17
  5. Step 5: Solve for x
    x = 320,337,437.17/18,959.76
  6. Step 6: Final answer
    x = 16,895.65

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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.