Home / 28,478.05-42,721.16-8,758.27

Finding the Fourth Proportional to 28,478.05, 42,721.16 and 8,758.27

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Solution

The fourth proportional to 28,478.05, 42,721.16 and 8,758.27 is: 13,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,478.05 : 42,721.16 = 8,758.27 : x
  2. Step 2: Convert to fraction form
    28,478.05/42,721.16 = 8,758.27/x
  3. Step 3: Cross multiply
    28,478.05x = 42,721.16 × 8,758.27
  4. Step 4: Simplify right side
    28,478.05x = 374,163,453.99
  5. Step 5: Solve for x
    x = 374,163,453.99/28,478.05
  6. Step 6: Final answer
    x = 13,138.66

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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.