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Finding the Fourth Proportional to 10,892.40, 16,338.60 and 10,287.60

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Solution

The fourth proportional to 10,892.40, 16,338.60 and 10,287.60 is: 15,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,892.40 : 16,338.60 = 10,287.60 : x
  2. Step 2: Convert to fraction form
    10,892.40/16,338.60 = 10,287.60/x
  3. Step 3: Cross multiply
    10,892.40x = 16,338.60 × 10,287.60
  4. Step 4: Simplify right side
    10,892.40x = 168,084,981.36
  5. Step 5: Solve for x
    x = 168,084,981.36/10,892.40
  6. Step 6: Final answer
    x = 15,431.40

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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.