Home / 21,071.12-31,608.36-12,306.92

Finding the Fourth Proportional to 21,071.12, 31,608.36 and 12,306.92

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Solution

The fourth proportional to 21,071.12, 31,608.36 and 12,306.92 is: 18,461.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.12 : 31,608.36 = 12,306.92 : x
  2. Step 2: Convert to fraction form
    21,071.12/31,608.36 = 12,306.92/x
  3. Step 3: Cross multiply
    21,071.12x = 31,608.36 × 12,306.92
  4. Step 4: Simplify right side
    21,071.12x = 389,001,557.85
  5. Step 5: Solve for x
    x = 389,001,557.85/21,071.12
  6. Step 6: Final answer
    x = 18,461.36

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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.