Home / 15,713.37-21,685.53-8,639.79

Finding the Fourth Proportional to 15,713.37, 21,685.53 and 8,639.79

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Solution

The fourth proportional to 15,713.37, 21,685.53 and 8,639.79 is: 11,923.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,713.37 : 21,685.53 = 8,639.79 : x
  2. Step 2: Convert to fraction form
    15,713.37/21,685.53 = 8,639.79/x
  3. Step 3: Cross multiply
    15,713.37x = 21,685.53 × 8,639.79
  4. Step 4: Simplify right side
    15,713.37x = 187,358,425.24
  5. Step 5: Solve for x
    x = 187,358,425.24/15,713.37
  6. Step 6: Final answer
    x = 11,923.50

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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.