Home / 20,472.07-30,689.84-7,989.19

Finding the Fourth Proportional to 20,472.07, 30,689.84 and 7,989.19

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Solution

The fourth proportional to 20,472.07, 30,689.84 and 7,989.19 is: 11,976.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,472.07 : 30,689.84 = 7,989.19 : x
  2. Step 2: Convert to fraction form
    20,472.07/30,689.84 = 7,989.19/x
  3. Step 3: Cross multiply
    20,472.07x = 30,689.84 × 7,989.19
  4. Step 4: Simplify right side
    20,472.07x = 245,186,962.83
  5. Step 5: Solve for x
    x = 245,186,962.83/20,472.07
  6. Step 6: Final answer
    x = 11,976.66

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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.