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Finding the Fourth Proportional to 10,966.60, 16,425.60 and 4,389.40

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Solution

The fourth proportional to 10,966.60, 16,425.60 and 4,389.40 is: 6,574.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,966.60 : 16,425.60 = 4,389.40 : x
  2. Step 2: Convert to fraction form
    10,966.60/16,425.60 = 4,389.40/x
  3. Step 3: Cross multiply
    10,966.60x = 16,425.60 × 4,389.40
  4. Step 4: Simplify right side
    10,966.60x = 72,098,528.64
  5. Step 5: Solve for x
    x = 72,098,528.64/10,966.60
  6. Step 6: Final answer
    x = 6,574.37

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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.