Home / 28,152.69-38,850.11-15,405.83

Finding the Fourth Proportional to 28,152.69, 38,850.11 and 15,405.83

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Solution

The fourth proportional to 28,152.69, 38,850.11 and 15,405.83 is: 21,259.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,152.69 : 38,850.11 = 15,405.83 : x
  2. Step 2: Convert to fraction form
    28,152.69/38,850.11 = 15,405.83/x
  3. Step 3: Cross multiply
    28,152.69x = 38,850.11 × 15,405.83
  4. Step 4: Simplify right side
    28,152.69x = 598,518,190.14
  5. Step 5: Solve for x
    x = 598,518,190.14/28,152.69
  6. Step 6: Final answer
    x = 21,259.72

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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.