Home / 21,827.76-30,131.64-15,135.54

Finding the Fourth Proportional to 21,827.76, 30,131.64 and 15,135.54

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Solution

The fourth proportional to 21,827.76, 30,131.64 and 15,135.54 is: 20,893.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.76 : 30,131.64 = 15,135.54 : x
  2. Step 2: Convert to fraction form
    21,827.76/30,131.64 = 15,135.54/x
  3. Step 3: Cross multiply
    21,827.76x = 30,131.64 × 15,135.54
  4. Step 4: Simplify right side
    21,827.76x = 456,058,642.49
  5. Step 5: Solve for x
    x = 456,058,642.49/21,827.76
  6. Step 6: Final answer
    x = 20,893.52

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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.