Home / 20,984.16-31,601.28-18,927.84

Finding the Fourth Proportional to 20,984.16, 31,601.28 and 18,927.84

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Solution

The fourth proportional to 20,984.16, 31,601.28 and 18,927.84 is: 28,504.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,984.16 : 31,601.28 = 18,927.84 : x
  2. Step 2: Convert to fraction form
    20,984.16/31,601.28 = 18,927.84/x
  3. Step 3: Cross multiply
    20,984.16x = 31,601.28 × 18,927.84
  4. Step 4: Simplify right side
    20,984.16x = 598,143,971.64
  5. Step 5: Solve for x
    x = 598,143,971.64/20,984.16
  6. Step 6: Final answer
    x = 28,504.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.