Home / 20,438.95-28,206.59-11,486.43

Finding the Fourth Proportional to 20,438.95, 28,206.59 and 11,486.43

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Solution

The fourth proportional to 20,438.95, 28,206.59 and 11,486.43 is: 15,851.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.95 : 28,206.59 = 11,486.43 : x
  2. Step 2: Convert to fraction form
    20,438.95/28,206.59 = 11,486.43/x
  3. Step 3: Cross multiply
    20,438.95x = 28,206.59 × 11,486.43
  4. Step 4: Simplify right side
    20,438.95x = 323,993,021.57
  5. Step 5: Solve for x
    x = 323,993,021.57/20,438.95
  6. Step 6: Final answer
    x = 15,851.74

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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.