Home / 20,726.07-31,089.10-5,143.69

Finding the Fourth Proportional to 20,726.07, 31,089.10 and 5,143.69

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Solution

The fourth proportional to 20,726.07, 31,089.10 and 5,143.69 is: 7,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,726.07 : 31,089.10 = 5,143.69 : x
  2. Step 2: Convert to fraction form
    20,726.07/31,089.10 = 5,143.69/x
  3. Step 3: Cross multiply
    20,726.07x = 31,089.10 × 5,143.69
  4. Step 4: Simplify right side
    20,726.07x = 159,912,692.78
  5. Step 5: Solve for x
    x = 159,912,692.78/20,726.07
  6. Step 6: Final answer
    x = 7,715.53

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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.