Home / 15,380.47-21,222.57-8,664.56

Finding the Fourth Proportional to 15,380.47, 21,222.57 and 8,664.56

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Solution

The fourth proportional to 15,380.47, 21,222.57 and 8,664.56 is: 11,955.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,380.47 : 21,222.57 = 8,664.56 : x
  2. Step 2: Convert to fraction form
    15,380.47/21,222.57 = 8,664.56/x
  3. Step 3: Cross multiply
    15,380.47x = 21,222.57 × 8,664.56
  4. Step 4: Simplify right side
    15,380.47x = 183,884,231.12
  5. Step 5: Solve for x
    x = 183,884,231.12/15,380.47
  6. Step 6: Final answer
    x = 11,955.70

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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.