Home / 21,771.28-30,044.37-12,339.84

Finding the Fourth Proportional to 21,771.28, 30,044.37 and 12,339.84

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Solution

The fourth proportional to 21,771.28, 30,044.37 and 12,339.84 is: 17,028.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,771.28 : 30,044.37 = 12,339.84 : x
  2. Step 2: Convert to fraction form
    21,771.28/30,044.37 = 12,339.84/x
  3. Step 3: Cross multiply
    21,771.28x = 30,044.37 × 12,339.84
  4. Step 4: Simplify right side
    21,771.28x = 370,742,808.23
  5. Step 5: Solve for x
    x = 370,742,808.23/21,771.28
  6. Step 6: Final answer
    x = 17,028.98

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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.