Home / 20,775.76-31,160.09-5,981.24

Finding the Fourth Proportional to 20,775.76, 31,160.09 and 5,981.24

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Solution

The fourth proportional to 20,775.76, 31,160.09 and 5,981.24 is: 8,970.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.76 : 31,160.09 = 5,981.24 : x
  2. Step 2: Convert to fraction form
    20,775.76/31,160.09 = 5,981.24/x
  3. Step 3: Cross multiply
    20,775.76x = 31,160.09 × 5,981.24
  4. Step 4: Simplify right side
    20,775.76x = 186,376,069.56
  5. Step 5: Solve for x
    x = 186,376,069.56/20,775.76
  6. Step 6: Final answer
    x = 8,970.84

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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.