Home / 20,868.37-28,799.28-11,916.59

Finding the Fourth Proportional to 20,868.37, 28,799.28 and 11,916.59

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Solution

The fourth proportional to 20,868.37, 28,799.28 and 11,916.59 is: 16,445.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.37 : 28,799.28 = 11,916.59 : x
  2. Step 2: Convert to fraction form
    20,868.37/28,799.28 = 11,916.59/x
  3. Step 3: Cross multiply
    20,868.37x = 28,799.28 × 11,916.59
  4. Step 4: Simplify right side
    20,868.37x = 343,189,068.06
  5. Step 5: Solve for x
    x = 343,189,068.06/20,868.37
  6. Step 6: Final answer
    x = 16,445.42

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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.