Home / 22,985.70-31,719.78-13,557.30

Finding the Fourth Proportional to 22,985.70, 31,719.78 and 13,557.30

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Solution

The fourth proportional to 22,985.70, 31,719.78 and 13,557.30 is: 18,708.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,985.70 : 31,719.78 = 13,557.30 : x
  2. Step 2: Convert to fraction form
    22,985.70/31,719.78 = 13,557.30/x
  3. Step 3: Cross multiply
    22,985.70x = 31,719.78 × 13,557.30
  4. Step 4: Simplify right side
    22,985.70x = 430,034,573.39
  5. Step 5: Solve for x
    x = 430,034,573.39/22,985.70
  6. Step 6: Final answer
    x = 18,708.79

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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.