Home / 28,289.21-39,039.12-15,543.21

Finding the Fourth Proportional to 28,289.21, 39,039.12 and 15,543.21

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Solution

The fourth proportional to 28,289.21, 39,039.12 and 15,543.21 is: 21,449.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.21 : 39,039.12 = 15,543.21 : x
  2. Step 2: Convert to fraction form
    28,289.21/39,039.12 = 15,543.21/x
  3. Step 3: Cross multiply
    28,289.21x = 39,039.12 × 15,543.21
  4. Step 4: Simplify right side
    28,289.21x = 606,793,035.69
  5. Step 5: Solve for x
    x = 606,793,035.69/28,289.21
  6. Step 6: Final answer
    x = 21,449.63

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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.