Home / 12,921.49-17,840.15-8,148.61

Finding the Fourth Proportional to 12,921.49, 17,840.15 and 8,148.61

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Solution

The fourth proportional to 12,921.49, 17,840.15 and 8,148.61 is: 11,250.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.49 : 17,840.15 = 8,148.61 : x
  2. Step 2: Convert to fraction form
    12,921.49/17,840.15 = 8,148.61/x
  3. Step 3: Cross multiply
    12,921.49x = 17,840.15 × 8,148.61
  4. Step 4: Simplify right side
    12,921.49x = 145,372,424.69
  5. Step 5: Solve for x
    x = 145,372,424.69/12,921.49
  6. Step 6: Final answer
    x = 11,250.44

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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.