Home / 20,885.31-31,290.21-13,848.57

Finding the Fourth Proportional to 20,885.31, 31,290.21 and 13,848.57

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Solution

The fourth proportional to 20,885.31, 31,290.21 and 13,848.57 is: 20,747.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.31 : 31,290.21 = 13,848.57 : x
  2. Step 2: Convert to fraction form
    20,885.31/31,290.21 = 13,848.57/x
  3. Step 3: Cross multiply
    20,885.31x = 31,290.21 × 13,848.57
  4. Step 4: Simplify right side
    20,885.31x = 433,324,663.50
  5. Step 5: Solve for x
    x = 433,324,663.50/20,885.31
  6. Step 6: Final answer
    x = 20,747.82

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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.