Home / 14,278.97-21,417.84-3,890.72

Finding the Fourth Proportional to 14,278.97, 21,417.84 and 3,890.72

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Solution

The fourth proportional to 14,278.97, 21,417.84 and 3,890.72 is: 5,835.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,278.97 : 21,417.84 = 3,890.72 : x
  2. Step 2: Convert to fraction form
    14,278.97/21,417.84 = 3,890.72/x
  3. Step 3: Cross multiply
    14,278.97x = 21,417.84 × 3,890.72
  4. Step 4: Simplify right side
    14,278.97x = 83,330,711.36
  5. Step 5: Solve for x
    x = 83,330,711.36/14,278.97
  6. Step 6: Final answer
    x = 5,835.91

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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.