Home / 28,109.12-42,188.27-15,643.22

Finding the Fourth Proportional to 28,109.12, 42,188.27 and 15,643.22

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Solution

The fourth proportional to 28,109.12, 42,188.27 and 15,643.22 is: 23,478.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.12 : 42,188.27 = 15,643.22 : x
  2. Step 2: Convert to fraction form
    28,109.12/42,188.27 = 15,643.22/x
  3. Step 3: Cross multiply
    28,109.12x = 42,188.27 × 15,643.22
  4. Step 4: Simplify right side
    28,109.12x = 659,960,099.87
  5. Step 5: Solve for x
    x = 659,960,099.87/28,109.12
  6. Step 6: Final answer
    x = 23,478.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.