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Finding the Fourth Proportional to 8,959.40, 13,410.30 and 4,788.96

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Solution

The fourth proportional to 8,959.40, 13,410.30 and 4,788.96 is: 7,168.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,959.40 : 13,410.30 = 4,788.96 : x
  2. Step 2: Convert to fraction form
    8,959.40/13,410.30 = 4,788.96/x
  3. Step 3: Cross multiply
    8,959.40x = 13,410.30 × 4,788.96
  4. Step 4: Simplify right side
    8,959.40x = 64,221,390.29
  5. Step 5: Solve for x
    x = 64,221,390.29/8,959.40
  6. Step 6: Final answer
    x = 7,168.05

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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.