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Finding the Fourth Proportional to 18,860.86, 25,826.78 and 18,117.28

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Solution

The fourth proportional to 18,860.86, 25,826.78 and 18,117.28 is: 24,808.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.86 : 25,826.78 = 18,117.28 : x
  2. Step 2: Convert to fraction form
    18,860.86/25,826.78 = 18,117.28/x
  3. Step 3: Cross multiply
    18,860.86x = 25,826.78 × 18,117.28
  4. Step 4: Simplify right side
    18,860.86x = 467,911,004.76
  5. Step 5: Solve for x
    x = 467,911,004.76/18,860.86
  6. Step 6: Final answer
    x = 24,808.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.