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Finding the Fourth Proportional to 42,807.42, 64,214.91 and 11,217.42

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Solution

The fourth proportional to 42,807.42, 64,214.91 and 11,217.42 is: 16,827.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,807.42 : 64,214.91 = 11,217.42 : x
  2. Step 2: Convert to fraction form
    42,807.42/64,214.91 = 11,217.42/x
  3. Step 3: Cross multiply
    42,807.42x = 64,214.91 × 11,217.42
  4. Step 4: Simplify right side
    42,807.42x = 720,325,615.73
  5. Step 5: Solve for x
    x = 720,325,615.73/42,807.42
  6. Step 6: Final answer
    x = 16,827.12

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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.