Home / 28,513.11-39,346.49-15,765.55

Finding the Fourth Proportional to 28,513.11, 39,346.49 and 15,765.55

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Solution

The fourth proportional to 28,513.11, 39,346.49 and 15,765.55 is: 21,755.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.11 : 39,346.49 = 15,765.55 : x
  2. Step 2: Convert to fraction form
    28,513.11/39,346.49 = 15,765.55/x
  3. Step 3: Cross multiply
    28,513.11x = 39,346.49 × 15,765.55
  4. Step 4: Simplify right side
    28,513.11x = 620,319,055.42
  5. Step 5: Solve for x
    x = 620,319,055.42/28,513.11
  6. Step 6: Final answer
    x = 21,755.57

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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.