Home / 15,520.79-21,418.62-8,447.06

Finding the Fourth Proportional to 15,520.79, 21,418.62 and 8,447.06

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Solution

The fourth proportional to 15,520.79, 21,418.62 and 8,447.06 is: 11,656.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.79 : 21,418.62 = 8,447.06 : x
  2. Step 2: Convert to fraction form
    15,520.79/21,418.62 = 8,447.06/x
  3. Step 3: Cross multiply
    15,520.79x = 21,418.62 × 8,447.06
  4. Step 4: Simplify right side
    15,520.79x = 180,924,368.26
  5. Step 5: Solve for x
    x = 180,924,368.26/15,520.79
  6. Step 6: Final answer
    x = 11,656.90

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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.