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Finding the Fourth Proportional to 18,959.72, 26,162.34 and 13,361

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Solution

The fourth proportional to 18,959.72, 26,162.34 and 13,361 is: 18,436.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,959.72 : 26,162.34 = 13,361 : x
  2. Step 2: Convert to fraction form
    18,959.72/26,162.34 = 13,361/x
  3. Step 3: Cross multiply
    18,959.72x = 26,162.34 × 13,361
  4. Step 4: Simplify right side
    18,959.72x = 349,555,024.74
  5. Step 5: Solve for x
    x = 349,555,024.74/18,959.72
  6. Step 6: Final answer
    x = 18,436.72

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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.