Home / 21,102.16-31,668.80-10,008.88

Finding the Fourth Proportional to 21,102.16, 31,668.80 and 10,008.88

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Solution

The fourth proportional to 21,102.16, 31,668.80 and 10,008.88 is: 15,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.16 : 31,668.80 = 10,008.88 : x
  2. Step 2: Convert to fraction form
    21,102.16/31,668.80 = 10,008.88/x
  3. Step 3: Cross multiply
    21,102.16x = 31,668.80 × 10,008.88
  4. Step 4: Simplify right side
    21,102.16x = 316,969,218.94
  5. Step 5: Solve for x
    x = 316,969,218.94/21,102.16
  6. Step 6: Final answer
    x = 15,020.70

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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.