Home / 28,187.63-42,283.42-11,320.64

Finding the Fourth Proportional to 28,187.63, 42,283.42 and 11,320.64

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Solution

The fourth proportional to 28,187.63, 42,283.42 and 11,320.64 is: 16,981.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,187.63 : 42,283.42 = 11,320.64 : x
  2. Step 2: Convert to fraction form
    28,187.63/42,283.42 = 11,320.64/x
  3. Step 3: Cross multiply
    28,187.63x = 42,283.42 × 11,320.64
  4. Step 4: Simplify right side
    28,187.63x = 478,675,375.79
  5. Step 5: Solve for x
    x = 478,675,375.79/28,187.63
  6. Step 6: Final answer
    x = 16,981.75

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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.