Home / 20,492.09-28,278.80-11,539.70

Finding the Fourth Proportional to 20,492.09, 28,278.80 and 11,539.70

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Solution

The fourth proportional to 20,492.09, 28,278.80 and 11,539.70 is: 15,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.09 : 28,278.80 = 11,539.70 : x
  2. Step 2: Convert to fraction form
    20,492.09/28,278.80 = 11,539.70/x
  3. Step 3: Cross multiply
    20,492.09x = 28,278.80 × 11,539.70
  4. Step 4: Simplify right side
    20,492.09x = 326,328,883.50
  5. Step 5: Solve for x
    x = 326,328,883.50/20,492.09
  6. Step 6: Final answer
    x = 15,924.63

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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.