Home / 20,340.51-28,082.96-13,965.05

Finding the Fourth Proportional to 20,340.51, 28,082.96 and 13,965.05

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Solution

The fourth proportional to 20,340.51, 28,082.96 and 13,965.05 is: 19,280.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.51 : 28,082.96 = 13,965.05 : x
  2. Step 2: Convert to fraction form
    20,340.51/28,082.96 = 13,965.05/x
  3. Step 3: Cross multiply
    20,340.51x = 28,082.96 × 13,965.05
  4. Step 4: Simplify right side
    20,340.51x = 392,179,940.55
  5. Step 5: Solve for x
    x = 392,179,940.55/20,340.51
  6. Step 6: Final answer
    x = 19,280.73

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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.