Home / 21,513.54-32,086.29-18,898.20

Finding the Fourth Proportional to 21,513.54, 32,086.29 and 18,898.20

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Solution

The fourth proportional to 21,513.54, 32,086.29 and 18,898.20 is: 28,185.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.54 : 32,086.29 = 18,898.20 : x
  2. Step 2: Convert to fraction form
    21,513.54/32,086.29 = 18,898.20/x
  3. Step 3: Cross multiply
    21,513.54x = 32,086.29 × 18,898.20
  4. Step 4: Simplify right side
    21,513.54x = 606,373,125.68
  5. Step 5: Solve for x
    x = 606,373,125.68/21,513.54
  6. Step 6: Final answer
    x = 28,185.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.