Home / 28,137.68-42,209.64-12,553.28

Finding the Fourth Proportional to 28,137.68, 42,209.64 and 12,553.28

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Solution

The fourth proportional to 28,137.68, 42,209.64 and 12,553.28 is: 18,831.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.68 : 42,209.64 = 12,553.28 : x
  2. Step 2: Convert to fraction form
    28,137.68/42,209.64 = 12,553.28/x
  3. Step 3: Cross multiply
    28,137.68x = 42,209.64 × 12,553.28
  4. Step 4: Simplify right side
    28,137.68x = 529,869,429.62
  5. Step 5: Solve for x
    x = 529,869,429.62/28,137.68
  6. Step 6: Final answer
    x = 18,831.31

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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.