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Finding the Fourth Proportional to 10,959.40, 16,439.10 and 4,390.30

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Solution

The fourth proportional to 10,959.40, 16,439.10 and 4,390.30 is: 6,585.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,959.40 : 16,439.10 = 4,390.30 : x
  2. Step 2: Convert to fraction form
    10,959.40/16,439.10 = 4,390.30/x
  3. Step 3: Cross multiply
    10,959.40x = 16,439.10 × 4,390.30
  4. Step 4: Simplify right side
    10,959.40x = 72,172,580.73
  5. Step 5: Solve for x
    x = 72,172,580.73/10,959.40
  6. Step 6: Final answer
    x = 6,585.45

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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.