Home / 20,868.02-28,800.24-11,916.80

Finding the Fourth Proportional to 20,868.02, 28,800.24 and 11,916.80

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Solution

The fourth proportional to 20,868.02, 28,800.24 and 11,916.80 is: 16,446.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.02 : 28,800.24 = 11,916.80 : x
  2. Step 2: Convert to fraction form
    20,868.02/28,800.24 = 11,916.80/x
  3. Step 3: Cross multiply
    20,868.02x = 28,800.24 × 11,916.80
  4. Step 4: Simplify right side
    20,868.02x = 343,206,700.03
  5. Step 5: Solve for x
    x = 343,206,700.03/20,868.02
  6. Step 6: Final answer
    x = 16,446.54

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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.