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Finding the Fourth Proportional to 20,697.78, 31,066.08 and 10,844.10

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Solution

The fourth proportional to 20,697.78, 31,066.08 and 10,844.10 is: 16,276.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.78 : 31,066.08 = 10,844.10 : x
  2. Step 2: Convert to fraction form
    20,697.78/31,066.08 = 10,844.10/x
  3. Step 3: Cross multiply
    20,697.78x = 31,066.08 × 10,844.10
  4. Step 4: Simplify right side
    20,697.78x = 336,883,678.13
  5. Step 5: Solve for x
    x = 336,883,678.13/20,697.78
  6. Step 6: Final answer
    x = 16,276.32

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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.