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Finding the Fourth Proportional to 47,249.64, 70,864.70 and 20,937.60

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Solution

The fourth proportional to 47,249.64, 70,864.70 and 20,937.60 is: 31,402.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,249.64 : 70,864.70 = 20,937.60 : x
  2. Step 2: Convert to fraction form
    47,249.64/70,864.70 = 20,937.60/x
  3. Step 3: Cross multiply
    47,249.64x = 70,864.70 × 20,937.60
  4. Step 4: Simplify right side
    47,249.64x = 1,483,736,742.72
  5. Step 5: Solve for x
    x = 1,483,736,742.72/47,249.64
  6. Step 6: Final answer
    x = 31,402.08

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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.