Home / 15,522.45-21,420.63-8,448.72

Finding the Fourth Proportional to 15,522.45, 21,420.63 and 8,448.72

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Solution

The fourth proportional to 15,522.45, 21,420.63 and 8,448.72 is: 11,659.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.45 : 21,420.63 = 8,448.72 : x
  2. Step 2: Convert to fraction form
    15,522.45/21,420.63 = 8,448.72/x
  3. Step 3: Cross multiply
    15,522.45x = 21,420.63 × 8,448.72
  4. Step 4: Simplify right side
    15,522.45x = 180,976,905.09
  5. Step 5: Solve for x
    x = 180,976,905.09/15,522.45
  6. Step 6: Final answer
    x = 11,659.04

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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.