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Finding the Fourth Proportional to 18,990.67, 26,205.78 and 10,492.71

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Solution

The fourth proportional to 18,990.67, 26,205.78 and 10,492.71 is: 14,479.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.67 : 26,205.78 = 10,492.71 : x
  2. Step 2: Convert to fraction form
    18,990.67/26,205.78 = 10,492.71/x
  3. Step 3: Cross multiply
    18,990.67x = 26,205.78 × 10,492.71
  4. Step 4: Simplify right side
    18,990.67x = 274,969,649.86
  5. Step 5: Solve for x
    x = 274,969,649.86/18,990.67
  6. Step 6: Final answer
    x = 14,479.20

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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.