Home / 20,343.70-28,071.06-11,391.58

Finding the Fourth Proportional to 20,343.70, 28,071.06 and 11,391.58

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Solution

The fourth proportional to 20,343.70, 28,071.06 and 11,391.58 is: 15,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,343.70 : 28,071.06 = 11,391.58 : x
  2. Step 2: Convert to fraction form
    20,343.70/28,071.06 = 11,391.58/x
  3. Step 3: Cross multiply
    20,343.70x = 28,071.06 × 11,391.58
  4. Step 4: Simplify right side
    20,343.70x = 319,773,725.67
  5. Step 5: Solve for x
    x = 319,773,725.67/20,343.70
  6. Step 6: Final answer
    x = 15,718.56

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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.