Home / 28,423.97-39,224.55-15,678.34

Finding the Fourth Proportional to 28,423.97, 39,224.55 and 15,678.34

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Solution

The fourth proportional to 28,423.97, 39,224.55 and 15,678.34 is: 21,635.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.97 : 39,224.55 = 15,678.34 : x
  2. Step 2: Convert to fraction form
    28,423.97/39,224.55 = 15,678.34/x
  3. Step 3: Cross multiply
    28,423.97x = 39,224.55 × 15,678.34
  4. Step 4: Simplify right side
    28,423.97x = 614,975,770.01
  5. Step 5: Solve for x
    x = 614,975,770.01/28,423.97
  6. Step 6: Final answer
    x = 21,635.82

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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.