Home / 31,072.68-42,866.64-20,997.41

Finding the Fourth Proportional to 31,072.68, 42,866.64 and 20,997.41

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Solution

The fourth proportional to 31,072.68, 42,866.64 and 20,997.41 is: 28,967.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072.68 : 42,866.64 = 20,997.41 : x
  2. Step 2: Convert to fraction form
    31,072.68/42,866.64 = 20,997.41/x
  3. Step 3: Cross multiply
    31,072.68x = 42,866.64 × 20,997.41
  4. Step 4: Simplify right side
    31,072.68x = 900,088,201.07
  5. Step 5: Solve for x
    x = 900,088,201.07/31,072.68
  6. Step 6: Final answer
    x = 28,967.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.