Home / 28,289.30-39,039.24-15,543.30

Finding the Fourth Proportional to 28,289.30, 39,039.24 and 15,543.30

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Solution

The fourth proportional to 28,289.30, 39,039.24 and 15,543.30 is: 21,449.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.30 : 39,039.24 = 15,543.30 : x
  2. Step 2: Convert to fraction form
    28,289.30/39,039.24 = 15,543.30/x
  3. Step 3: Cross multiply
    28,289.30x = 39,039.24 × 15,543.30
  4. Step 4: Simplify right side
    28,289.30x = 606,798,604.18
  5. Step 5: Solve for x
    x = 606,798,604.18/28,289.30
  6. Step 6: Final answer
    x = 21,449.76

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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.