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Finding the Fourth Proportional to 19,599.85, 29,421.92 and 7,921.27

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Solution

The fourth proportional to 19,599.85, 29,421.92 and 7,921.27 is: 11,890.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,599.85 : 29,421.92 = 7,921.27 : x
  2. Step 2: Convert to fraction form
    19,599.85/29,421.92 = 7,921.27/x
  3. Step 3: Cross multiply
    19,599.85x = 29,421.92 × 7,921.27
  4. Step 4: Simplify right side
    19,599.85x = 233,058,972.24
  5. Step 5: Solve for x
    x = 233,058,972.24/19,599.85
  6. Step 6: Final answer
    x = 11,890.85

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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.