Home / 28,423.87-42,665.38-20,935.89

Finding the Fourth Proportional to 28,423.87, 42,665.38 and 20,935.89

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Solution

The fourth proportional to 28,423.87, 42,665.38 and 20,935.89 is: 31,425.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,423.87 : 42,665.38 = 20,935.89 : x
  2. Step 2: Convert to fraction form
    28,423.87/42,665.38 = 20,935.89/x
  3. Step 3: Cross multiply
    28,423.87x = 42,665.38 × 20,935.89
  4. Step 4: Simplify right side
    28,423.87x = 893,237,568.66
  5. Step 5: Solve for x
    x = 893,237,568.66/28,423.87
  6. Step 6: Final answer
    x = 31,425.61

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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.