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Finding the Fourth Proportional to 42,943.76, 64,408.12 and 11,354.12

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Solution

The fourth proportional to 42,943.76, 64,408.12 and 11,354.12 is: 17,029.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,943.76 : 64,408.12 = 11,354.12 : x
  2. Step 2: Convert to fraction form
    42,943.76/64,408.12 = 11,354.12/x
  3. Step 3: Cross multiply
    42,943.76x = 64,408.12 × 11,354.12
  4. Step 4: Simplify right side
    42,943.76x = 731,297,523.45
  5. Step 5: Solve for x
    x = 731,297,523.45/42,943.76
  6. Step 6: Final answer
    x = 17,029.19

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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.