Home / 20,943.78-31,412.43-13,600.32

Finding the Fourth Proportional to 20,943.78, 31,412.43 and 13,600.32

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Solution

The fourth proportional to 20,943.78, 31,412.43 and 13,600.32 is: 20,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.78 : 31,412.43 = 13,600.32 : x
  2. Step 2: Convert to fraction form
    20,943.78/31,412.43 = 13,600.32/x
  3. Step 3: Cross multiply
    20,943.78x = 31,412.43 × 13,600.32
  4. Step 4: Simplify right side
    20,943.78x = 427,219,099.98
  5. Step 5: Solve for x
    x = 427,219,099.98/20,943.78
  6. Step 6: Final answer
    x = 20,398.38

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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.