Home / 21,293.18-29,378.09-12,338.96

Finding the Fourth Proportional to 21,293.18, 29,378.09 and 12,338.96

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Solution

The fourth proportional to 21,293.18, 29,378.09 and 12,338.96 is: 17,023.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,293.18 : 29,378.09 = 12,338.96 : x
  2. Step 2: Convert to fraction form
    21,293.18/29,378.09 = 12,338.96/x
  3. Step 3: Cross multiply
    21,293.18x = 29,378.09 × 12,338.96
  4. Step 4: Simplify right side
    21,293.18x = 362,494,868.80
  5. Step 5: Solve for x
    x = 362,494,868.80/21,293.18
  6. Step 6: Final answer
    x = 17,023.99

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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.