Home / 21,278.04-31,913.72-8,127.49

Finding the Fourth Proportional to 21,278.04, 31,913.72 and 8,127.49

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Solution

The fourth proportional to 21,278.04, 31,913.72 and 8,127.49 is: 12,189.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.04 : 31,913.72 = 8,127.49 : x
  2. Step 2: Convert to fraction form
    21,278.04/31,913.72 = 8,127.49/x
  3. Step 3: Cross multiply
    21,278.04x = 31,913.72 × 8,127.49
  4. Step 4: Simplify right side
    21,278.04x = 259,378,440.16
  5. Step 5: Solve for x
    x = 259,378,440.16/21,278.04
  6. Step 6: Final answer
    x = 12,189.96

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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.