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Finding the Fourth Proportional to 19,920.54, 29,881.62 and 5,880.56

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Solution

The fourth proportional to 19,920.54, 29,881.62 and 5,880.56 is: 8,821.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.54 : 29,881.62 = 5,880.56 : x
  2. Step 2: Convert to fraction form
    19,920.54/29,881.62 = 5,880.56/x
  3. Step 3: Cross multiply
    19,920.54x = 29,881.62 × 5,880.56
  4. Step 4: Simplify right side
    19,920.54x = 175,720,659.31
  5. Step 5: Solve for x
    x = 175,720,659.31/19,920.54
  6. Step 6: Final answer
    x = 8,821.08

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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.