Home / 15,713.60-21,684.80-8,640.02

Finding the Fourth Proportional to 15,713.60, 21,684.80 and 8,640.02

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Solution

The fourth proportional to 15,713.60, 21,684.80 and 8,640.02 is: 11,923.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.60 : 21,684.80 = 8,640.02 : x
  2. Step 2: Convert to fraction form
    15,713.60/21,684.80 = 8,640.02/x
  3. Step 3: Cross multiply
    15,713.60x = 21,684.80 × 8,640.02
  4. Step 4: Simplify right side
    15,713.60x = 187,357,105.70
  5. Step 5: Solve for x
    x = 187,357,105.70/15,713.60
  6. Step 6: Final answer
    x = 11,923.25

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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.