Home / 18,772.40-28,157.16-4,921.04

Finding the Fourth Proportional to 18,772.40, 28,157.16 and 4,921.04

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Solution

The fourth proportional to 18,772.40, 28,157.16 and 4,921.04 is: 7,381.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.40 : 28,157.16 = 4,921.04 : x
  2. Step 2: Convert to fraction form
    18,772.40/28,157.16 = 4,921.04/x
  3. Step 3: Cross multiply
    18,772.40x = 28,157.16 × 4,921.04
  4. Step 4: Simplify right side
    18,772.40x = 138,562,510.65
  5. Step 5: Solve for x
    x = 138,562,510.65/18,772.40
  6. Step 6: Final answer
    x = 7,381.18

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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.