Home / 18,278.10-27,428.12-7,889.84

Finding the Fourth Proportional to 18,278.10, 27,428.12 and 7,889.84

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Solution

The fourth proportional to 18,278.10, 27,428.12 and 7,889.84 is: 11,839.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.10 : 27,428.12 = 7,889.84 : x
  2. Step 2: Convert to fraction form
    18,278.10/27,428.12 = 7,889.84/x
  3. Step 3: Cross multiply
    18,278.10x = 27,428.12 × 7,889.84
  4. Step 4: Simplify right side
    18,278.10x = 216,403,478.30
  5. Step 5: Solve for x
    x = 216,403,478.30/18,278.10
  6. Step 6: Final answer
    x = 11,839.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.