Home / 15,731.28-21,709.44-9,018

Finding the Fourth Proportional to 15,731.28, 21,709.44 and 9,018

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Solution

The fourth proportional to 15,731.28, 21,709.44 and 9,018 is: 12,445.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.28 : 21,709.44 = 9,018 : x
  2. Step 2: Convert to fraction form
    15,731.28/21,709.44 = 9,018/x
  3. Step 3: Cross multiply
    15,731.28x = 21,709.44 × 9,018
  4. Step 4: Simplify right side
    15,731.28x = 195,775,729.92
  5. Step 5: Solve for x
    x = 195,775,729.92/15,731.28
  6. Step 6: Final answer
    x = 12,445.00

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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.