Home / 18,921.40-28,381.04-5,772.72

Finding the Fourth Proportional to 18,921.40, 28,381.04 and 5,772.72

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Solution

The fourth proportional to 18,921.40, 28,381.04 and 5,772.72 is: 8,658.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.40 : 28,381.04 = 5,772.72 : x
  2. Step 2: Convert to fraction form
    18,921.40/28,381.04 = 5,772.72/x
  3. Step 3: Cross multiply
    18,921.40x = 28,381.04 × 5,772.72
  4. Step 4: Simplify right side
    18,921.40x = 163,835,797.23
  5. Step 5: Solve for x
    x = 163,835,797.23/18,921.40
  6. Step 6: Final answer
    x = 8,658.76

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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.