Home / 12,680.70-17,503.43-8,904.78

Finding the Fourth Proportional to 12,680.70, 17,503.43 and 8,904.78

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Solution

The fourth proportional to 12,680.70, 17,503.43 and 8,904.78 is: 12,291.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,680.70 : 17,503.43 = 8,904.78 : x
  2. Step 2: Convert to fraction form
    12,680.70/17,503.43 = 8,904.78/x
  3. Step 3: Cross multiply
    12,680.70x = 17,503.43 × 8,904.78
  4. Step 4: Simplify right side
    12,680.70x = 155,864,215.66
  5. Step 5: Solve for x
    x = 155,864,215.66/12,680.70
  6. Step 6: Final answer
    x = 12,291.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.