Home / 10,902.80-16,362.48-7,988.72

Finding the Fourth Proportional to 10,902.80, 16,362.48 and 7,988.72

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Solution

The fourth proportional to 10,902.80, 16,362.48 and 7,988.72 is: 11,989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,902.80 : 16,362.48 = 7,988.72 : x
  2. Step 2: Convert to fraction form
    10,902.80/16,362.48 = 7,988.72/x
  3. Step 3: Cross multiply
    10,902.80x = 16,362.48 × 7,988.72
  4. Step 4: Simplify right side
    10,902.80x = 130,715,271.23
  5. Step 5: Solve for x
    x = 130,715,271.23/10,902.80
  6. Step 6: Final answer
    x = 11,989.15

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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.