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Finding the Fourth Proportional to 28,351, 39,124.38 and 15,776.56

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Solution

The fourth proportional to 28,351, 39,124.38 and 15,776.56 is: 21,771.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,351 : 39,124.38 = 15,776.56 : x
  2. Step 2: Convert to fraction form
    28,351/39,124.38 = 15,776.56/x
  3. Step 3: Cross multiply
    28,351x = 39,124.38 × 15,776.56
  4. Step 4: Simplify right side
    28,351x = 617,248,128.53
  5. Step 5: Solve for x
    x = 617,248,128.53/28,351
  6. Step 6: Final answer
    x = 21,771.65

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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.