Home / 10,209.98-15,300.62-8,120.72

Finding the Fourth Proportional to 10,209.98, 15,300.62 and 8,120.72

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Solution

The fourth proportional to 10,209.98, 15,300.62 and 8,120.72 is: 12,169.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,209.98 : 15,300.62 = 8,120.72 : x
  2. Step 2: Convert to fraction form
    10,209.98/15,300.62 = 8,120.72/x
  3. Step 3: Cross multiply
    10,209.98x = 15,300.62 × 8,120.72
  4. Step 4: Simplify right side
    10,209.98x = 124,251,933.74
  5. Step 5: Solve for x
    x = 124,251,933.74/10,209.98
  6. Step 6: Final answer
    x = 12,169.66

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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.