Home / 31,072.29-42,865.09-21,004.26

Finding the Fourth Proportional to 31,072.29, 42,865.09 and 21,004.26

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Solution

The fourth proportional to 31,072.29, 42,865.09 and 21,004.26 is: 28,975.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072.29 : 42,865.09 = 21,004.26 : x
  2. Step 2: Convert to fraction form
    31,072.29/42,865.09 = 21,004.26/x
  3. Step 3: Cross multiply
    31,072.29x = 42,865.09 × 21,004.26
  4. Step 4: Simplify right side
    31,072.29x = 900,349,495.28
  5. Step 5: Solve for x
    x = 900,349,495.28/31,072.29
  6. Step 6: Final answer
    x = 28,975.96

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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.