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Finding the Fourth Proportional to 19,948.30, 29,920.05 and 8,260.30

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Solution

The fourth proportional to 19,948.30, 29,920.05 and 8,260.30 is: 12,389.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,948.30 : 29,920.05 = 8,260.30 : x
  2. Step 2: Convert to fraction form
    19,948.30/29,920.05 = 8,260.30/x
  3. Step 3: Cross multiply
    19,948.30x = 29,920.05 × 8,260.30
  4. Step 4: Simplify right side
    19,948.30x = 247,148,589.02
  5. Step 5: Solve for x
    x = 247,148,589.02/19,948.30
  6. Step 6: Final answer
    x = 12,389.46

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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.