Home / 20,994.30-31,491.56-5,411.92

Finding the Fourth Proportional to 20,994.30, 31,491.56 and 5,411.92

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Solution

The fourth proportional to 20,994.30, 31,491.56 and 5,411.92 is: 8,117.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.30 : 31,491.56 = 5,411.92 : x
  2. Step 2: Convert to fraction form
    20,994.30/31,491.56 = 5,411.92/x
  3. Step 3: Cross multiply
    20,994.30x = 31,491.56 × 5,411.92
  4. Step 4: Simplify right side
    20,994.30x = 170,429,803.40
  5. Step 5: Solve for x
    x = 170,429,803.40/20,994.30
  6. Step 6: Final answer
    x = 8,117.91

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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.