Home / 30,911.16-42,638.19-27,131.28

Finding the Fourth Proportional to 30,911.16, 42,638.19 and 27,131.28

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Solution

The fourth proportional to 30,911.16, 42,638.19 and 27,131.28 is: 37,424.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.16 : 42,638.19 = 27,131.28 : x
  2. Step 2: Convert to fraction form
    30,911.16/42,638.19 = 27,131.28/x
  3. Step 3: Cross multiply
    30,911.16x = 42,638.19 × 27,131.28
  4. Step 4: Simplify right side
    30,911.16x = 1,156,828,671.58
  5. Step 5: Solve for x
    x = 1,156,828,671.58/30,911.16
  6. Step 6: Final answer
    x = 37,424.30

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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.