Home / 13,215.47-19,902.40-12,034.49

Finding the Fourth Proportional to 13,215.47, 19,902.40 and 12,034.49

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Solution

The fourth proportional to 13,215.47, 19,902.40 and 12,034.49 is: 18,123.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,215.47 : 19,902.40 = 12,034.49 : x
  2. Step 2: Convert to fraction form
    13,215.47/19,902.40 = 12,034.49/x
  3. Step 3: Cross multiply
    13,215.47x = 19,902.40 × 12,034.49
  4. Step 4: Simplify right side
    13,215.47x = 239,515,253.45
  5. Step 5: Solve for x
    x = 239,515,253.45/13,215.47
  6. Step 6: Final answer
    x = 18,123.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.