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Finding the Fourth Proportional to 20,656.40, 30,974.36 and 8,808.32

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Solution

The fourth proportional to 20,656.40, 30,974.36 and 8,808.32 is: 13,208.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.40 : 30,974.36 = 8,808.32 : x
  2. Step 2: Convert to fraction form
    20,656.40/30,974.36 = 8,808.32/x
  3. Step 3: Cross multiply
    20,656.40x = 30,974.36 × 8,808.32
  4. Step 4: Simplify right side
    20,656.40x = 272,832,108.07
  5. Step 5: Solve for x
    x = 272,832,108.07/20,656.40
  6. Step 6: Final answer
    x = 13,208.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.