Home / 18,784.04-28,170.30-7,678.76

Finding the Fourth Proportional to 18,784.04, 28,170.30 and 7,678.76

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Solution

The fourth proportional to 18,784.04, 28,170.30 and 7,678.76 is: 11,515.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784.04 : 28,170.30 = 7,678.76 : x
  2. Step 2: Convert to fraction form
    18,784.04/28,170.30 = 7,678.76/x
  3. Step 3: Cross multiply
    18,784.04x = 28,170.30 × 7,678.76
  4. Step 4: Simplify right side
    18,784.04x = 216,312,972.83
  5. Step 5: Solve for x
    x = 216,312,972.83/18,784.04
  6. Step 6: Final answer
    x = 11,515.79

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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.