Home / 21,130.82-29,182.33-18,284.54

Finding the Fourth Proportional to 21,130.82, 29,182.33 and 18,284.54

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Solution

The fourth proportional to 21,130.82, 29,182.33 and 18,284.54 is: 25,251.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.82 : 29,182.33 = 18,284.54 : x
  2. Step 2: Convert to fraction form
    21,130.82/29,182.33 = 18,284.54/x
  3. Step 3: Cross multiply
    21,130.82x = 29,182.33 × 18,284.54
  4. Step 4: Simplify right side
    21,130.82x = 533,585,254.27
  5. Step 5: Solve for x
    x = 533,585,254.27/21,130.82
  6. Step 6: Final answer
    x = 25,251.51

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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.