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Finding the Fourth Proportional to 20,618.30, 30,931.65 and 6,577.94

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Solution

The fourth proportional to 20,618.30, 30,931.65 and 6,577.94 is: 9,868.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.30 : 30,931.65 = 6,577.94 : x
  2. Step 2: Convert to fraction form
    20,618.30/30,931.65 = 6,577.94/x
  3. Step 3: Cross multiply
    20,618.30x = 30,931.65 × 6,577.94
  4. Step 4: Simplify right side
    20,618.30x = 203,466,383.14
  5. Step 5: Solve for x
    x = 203,466,383.14/20,618.30
  6. Step 6: Final answer
    x = 9,868.24

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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.