Home / 15,390-21,238.20-8,766

Finding the Fourth Proportional to 15,390, 21,238.20 and 8,766

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Solution

The fourth proportional to 15,390, 21,238.20 and 8,766 is: 12,097.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390 : 21,238.20 = 8,766 : x
  2. Step 2: Convert to fraction form
    15,390/21,238.20 = 8,766/x
  3. Step 3: Cross multiply
    15,390x = 21,238.20 × 8,766
  4. Step 4: Simplify right side
    15,390x = 186,174,061.20
  5. Step 5: Solve for x
    x = 186,174,061.20/15,390
  6. Step 6: Final answer
    x = 12,097.08

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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.