Home / 21,168.07-31,729.87-7,123.22

Finding the Fourth Proportional to 21,168.07, 31,729.87 and 7,123.22

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Solution

The fourth proportional to 21,168.07, 31,729.87 and 7,123.22 is: 10,677.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.07 : 31,729.87 = 7,123.22 : x
  2. Step 2: Convert to fraction form
    21,168.07/31,729.87 = 7,123.22/x
  3. Step 3: Cross multiply
    21,168.07x = 31,729.87 × 7,123.22
  4. Step 4: Simplify right side
    21,168.07x = 226,018,844.58
  5. Step 5: Solve for x
    x = 226,018,844.58/21,168.07
  6. Step 6: Final answer
    x = 10,677.35

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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.