Home / 31,072.88-42,886.13-18,325.28

Finding the Fourth Proportional to 31,072.88, 42,886.13 and 18,325.28

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Solution

The fourth proportional to 31,072.88, 42,886.13 and 18,325.28 is: 25,292.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,072.88 : 42,886.13 = 18,325.28 : x
  2. Step 2: Convert to fraction form
    31,072.88/42,886.13 = 18,325.28/x
  3. Step 3: Cross multiply
    31,072.88x = 42,886.13 × 18,325.28
  4. Step 4: Simplify right side
    31,072.88x = 785,900,034.31
  5. Step 5: Solve for x
    x = 785,900,034.31/31,072.88
  6. Step 6: Final answer
    x = 25,292.16

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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.