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Finding the Fourth Proportional to 18,137.77, 25,041.79 and 12,470.71

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Solution

The fourth proportional to 18,137.77, 25,041.79 and 12,470.71 is: 17,217.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,137.77 : 25,041.79 = 12,470.71 : x
  2. Step 2: Convert to fraction form
    18,137.77/25,041.79 = 12,470.71/x
  3. Step 3: Cross multiply
    18,137.77x = 25,041.79 × 12,470.71
  4. Step 4: Simplify right side
    18,137.77x = 312,288,775.76
  5. Step 5: Solve for x
    x = 312,288,775.76/18,137.77
  6. Step 6: Final answer
    x = 17,217.60

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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.