Home / 20,760.79-31,126.10-8,277.07

Finding the Fourth Proportional to 20,760.79, 31,126.10 and 8,277.07

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Solution

The fourth proportional to 20,760.79, 31,126.10 and 8,277.07 is: 12,409.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.79 : 31,126.10 = 8,277.07 : x
  2. Step 2: Convert to fraction form
    20,760.79/31,126.10 = 8,277.07/x
  3. Step 3: Cross multiply
    20,760.79x = 31,126.10 × 8,277.07
  4. Step 4: Simplify right side
    20,760.79x = 257,632,807.80
  5. Step 5: Solve for x
    x = 257,632,807.80/20,760.79
  6. Step 6: Final answer
    x = 12,409.59

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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.