Home / 21,270.68-31,912.56-10,889.72

Finding the Fourth Proportional to 21,270.68, 31,912.56 and 10,889.72

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Solution

The fourth proportional to 21,270.68, 31,912.56 and 10,889.72 is: 16,337.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.68 : 31,912.56 = 10,889.72 : x
  2. Step 2: Convert to fraction form
    21,270.68/31,912.56 = 10,889.72/x
  3. Step 3: Cross multiply
    21,270.68x = 31,912.56 × 10,889.72
  4. Step 4: Simplify right side
    21,270.68x = 347,518,842.88
  5. Step 5: Solve for x
    x = 347,518,842.88/21,270.68
  6. Step 6: Final answer
    x = 16,337.93

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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.