Home / 20,712.94-31,069.71-5,130.56

Finding the Fourth Proportional to 20,712.94, 31,069.71 and 5,130.56

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Solution

The fourth proportional to 20,712.94, 31,069.71 and 5,130.56 is: 7,695.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.94 : 31,069.71 = 5,130.56 : x
  2. Step 2: Convert to fraction form
    20,712.94/31,069.71 = 5,130.56/x
  3. Step 3: Cross multiply
    20,712.94x = 31,069.71 × 5,130.56
  4. Step 4: Simplify right side
    20,712.94x = 159,405,089.01
  5. Step 5: Solve for x
    x = 159,405,089.01/20,712.94
  6. Step 6: Final answer
    x = 7,695.92

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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.