Home / 28,509.11-39,340.87-15,761.53

Finding the Fourth Proportional to 28,509.11, 39,340.87 and 15,761.53

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Solution

The fourth proportional to 28,509.11, 39,340.87 and 15,761.53 is: 21,749.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,509.11 : 39,340.87 = 15,761.53 : x
  2. Step 2: Convert to fraction form
    28,509.11/39,340.87 = 15,761.53/x
  3. Step 3: Cross multiply
    28,509.11x = 39,340.87 × 15,761.53
  4. Step 4: Simplify right side
    28,509.11x = 620,072,106.03
  5. Step 5: Solve for x
    x = 620,072,106.03/28,509.11
  6. Step 6: Final answer
    x = 21,749.97

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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.