Home / 21,269.54-29,348.38-12,315.49

Finding the Fourth Proportional to 21,269.54, 29,348.38 and 12,315.49

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Solution

The fourth proportional to 21,269.54, 29,348.38 and 12,315.49 is: 16,993.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.54 : 29,348.38 = 12,315.49 : x
  2. Step 2: Convert to fraction form
    21,269.54/29,348.38 = 12,315.49/x
  3. Step 3: Cross multiply
    21,269.54x = 29,348.38 × 12,315.49
  4. Step 4: Simplify right side
    21,269.54x = 361,439,718.24
  5. Step 5: Solve for x
    x = 361,439,718.24/21,269.54
  6. Step 6: Final answer
    x = 16,993.30

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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.