Home / 28,616.76-42,935.94-11,988

Finding the Fourth Proportional to 28,616.76, 42,935.94 and 11,988

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Solution

The fourth proportional to 28,616.76, 42,935.94 and 11,988 is: 17,986.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,616.76 : 42,935.94 = 11,988 : x
  2. Step 2: Convert to fraction form
    28,616.76/42,935.94 = 11,988/x
  3. Step 3: Cross multiply
    28,616.76x = 42,935.94 × 11,988
  4. Step 4: Simplify right side
    28,616.76x = 514,716,048.72
  5. Step 5: Solve for x
    x = 514,716,048.72/28,616.76
  6. Step 6: Final answer
    x = 17,986.52

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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.