Home / 28,137.60-42,128.64-14,218.56

Finding the Fourth Proportional to 28,137.60, 42,128.64 and 14,218.56

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Solution

The fourth proportional to 28,137.60, 42,128.64 and 14,218.56 is: 21,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.60 : 42,128.64 = 14,218.56 : x
  2. Step 2: Convert to fraction form
    28,137.60/42,128.64 = 14,218.56/x
  3. Step 3: Cross multiply
    28,137.60x = 42,128.64 × 14,218.56
  4. Step 4: Simplify right side
    28,137.60x = 599,008,595.56
  5. Step 5: Solve for x
    x = 599,008,595.56/28,137.60
  6. Step 6: Final answer
    x = 21,288.55

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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.