Home / 18,501.20-27,740.28-7,977.84

Finding the Fourth Proportional to 18,501.20, 27,740.28 and 7,977.84

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Solution

The fourth proportional to 18,501.20, 27,740.28 and 7,977.84 is: 11,961.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,501.20 : 27,740.28 = 7,977.84 : x
  2. Step 2: Convert to fraction form
    18,501.20/27,740.28 = 7,977.84/x
  3. Step 3: Cross multiply
    18,501.20x = 27,740.28 × 7,977.84
  4. Step 4: Simplify right side
    18,501.20x = 221,307,515.40
  5. Step 5: Solve for x
    x = 221,307,515.40/18,501.20
  6. Step 6: Final answer
    x = 11,961.79

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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.