Home / 31,117.43-42,908.08-21,028.37

Finding the Fourth Proportional to 31,117.43, 42,908.08 and 21,028.37

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Solution

The fourth proportional to 31,117.43, 42,908.08 and 21,028.37 is: 28,996.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,117.43 : 42,908.08 = 21,028.37 : x
  2. Step 2: Convert to fraction form
    31,117.43/42,908.08 = 21,028.37/x
  3. Step 3: Cross multiply
    31,117.43x = 42,908.08 × 21,028.37
  4. Step 4: Simplify right side
    31,117.43x = 902,286,715.12
  5. Step 5: Solve for x
    x = 902,286,715.12/31,117.43
  6. Step 6: Final answer
    x = 28,996.19

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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.