Home / 15,522.31-21,420.87-8,448.71

Finding the Fourth Proportional to 15,522.31, 21,420.87 and 8,448.71

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Solution

The fourth proportional to 15,522.31, 21,420.87 and 8,448.71 is: 11,659.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.31 : 21,420.87 = 8,448.71 : x
  2. Step 2: Convert to fraction form
    15,522.31/21,420.87 = 8,448.71/x
  3. Step 3: Cross multiply
    15,522.31x = 21,420.87 × 8,448.71
  4. Step 4: Simplify right side
    15,522.31x = 180,978,718.58
  5. Step 5: Solve for x
    x = 180,978,718.58/15,522.31
  6. Step 6: Final answer
    x = 11,659.27

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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.