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Finding the Fourth Proportional to 19,811.30, 29,715.49 and 7,325.51

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Solution

The fourth proportional to 19,811.30, 29,715.49 and 7,325.51 is: 10,987.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.30 : 29,715.49 = 7,325.51 : x
  2. Step 2: Convert to fraction form
    19,811.30/29,715.49 = 7,325.51/x
  3. Step 3: Cross multiply
    19,811.30x = 29,715.49 × 7,325.51
  4. Step 4: Simplify right side
    19,811.30x = 217,681,119.15
  5. Step 5: Solve for x
    x = 217,681,119.15/19,811.30
  6. Step 6: Final answer
    x = 10,987.73

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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.