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Finding the Fourth Proportional to 18,851.88, 26,043.54 and 12,406.71

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Solution

The fourth proportional to 18,851.88, 26,043.54 and 12,406.71 is: 17,139.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,851.88 : 26,043.54 = 12,406.71 : x
  2. Step 2: Convert to fraction form
    18,851.88/26,043.54 = 12,406.71/x
  3. Step 3: Cross multiply
    18,851.88x = 26,043.54 × 12,406.71
  4. Step 4: Simplify right side
    18,851.88x = 323,114,648.15
  5. Step 5: Solve for x
    x = 323,114,648.15/18,851.88
  6. Step 6: Final answer
    x = 17,139.65

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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.