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Finding the Fourth Proportional to 10,959.70, 16,443.60 and 4,390.60

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Solution

The fourth proportional to 10,959.70, 16,443.60 and 4,390.60 is: 6,587.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.70 : 16,443.60 = 4,390.60 : x
  2. Step 2: Convert to fraction form
    10,959.70/16,443.60 = 4,390.60/x
  3. Step 3: Cross multiply
    10,959.70x = 16,443.60 × 4,390.60
  4. Step 4: Simplify right side
    10,959.70x = 72,197,270.16
  5. Step 5: Solve for x
    x = 72,197,270.16/10,959.70
  6. Step 6: Final answer
    x = 6,587.52

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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.