Home / 20,666.91-31,002.21-7,515.75

Finding the Fourth Proportional to 20,666.91, 31,002.21 and 7,515.75

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Solution

The fourth proportional to 20,666.91, 31,002.21 and 7,515.75 is: 11,274.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.91 : 31,002.21 = 7,515.75 : x
  2. Step 2: Convert to fraction form
    20,666.91/31,002.21 = 7,515.75/x
  3. Step 3: Cross multiply
    20,666.91x = 31,002.21 × 7,515.75
  4. Step 4: Simplify right side
    20,666.91x = 233,004,976.07
  5. Step 5: Solve for x
    x = 233,004,976.07/20,666.91
  6. Step 6: Final answer
    x = 11,274.30

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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.