Home / 15,689.20-21,644.40-9,716.80

Finding the Fourth Proportional to 15,689.20, 21,644.40 and 9,716.80

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Solution

The fourth proportional to 15,689.20, 21,644.40 and 9,716.80 is: 13,405.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.20 : 21,644.40 = 9,716.80 : x
  2. Step 2: Convert to fraction form
    15,689.20/21,644.40 = 9,716.80/x
  3. Step 3: Cross multiply
    15,689.20x = 21,644.40 × 9,716.80
  4. Step 4: Simplify right side
    15,689.20x = 210,314,305.92
  5. Step 5: Solve for x
    x = 210,314,305.92/15,689.20
  6. Step 6: Final answer
    x = 13,405.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.