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Finding the Fourth Proportional to 19,778.26, 29,679.06 and 7,307.11

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Solution

The fourth proportional to 19,778.26, 29,679.06 and 7,307.11 is: 10,964.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,778.26 : 29,679.06 = 7,307.11 : x
  2. Step 2: Convert to fraction form
    19,778.26/29,679.06 = 7,307.11/x
  3. Step 3: Cross multiply
    19,778.26x = 29,679.06 × 7,307.11
  4. Step 4: Simplify right side
    19,778.26x = 216,868,156.12
  5. Step 5: Solve for x
    x = 216,868,156.12/19,778.26
  6. Step 6: Final answer
    x = 10,964.98

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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.