Home / 28,431.81-39,251.75-19,959.93

Finding the Fourth Proportional to 28,431.81, 39,251.75 and 19,959.93

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Solution

The fourth proportional to 28,431.81, 39,251.75 and 19,959.93 is: 27,555.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431.81 : 39,251.75 = 19,959.93 : x
  2. Step 2: Convert to fraction form
    28,431.81/39,251.75 = 19,959.93/x
  3. Step 3: Cross multiply
    28,431.81x = 39,251.75 × 19,959.93
  4. Step 4: Simplify right side
    28,431.81x = 783,462,082.58
  5. Step 5: Solve for x
    x = 783,462,082.58/28,431.81
  6. Step 6: Final answer
    x = 27,555.83

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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.