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Finding the Fourth Proportional to 18,980, 28,434.36 and 17,547.92

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Solution

The fourth proportional to 18,980, 28,434.36 and 17,547.92 is: 26,288.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,980 : 28,434.36 = 17,547.92 : x
  2. Step 2: Convert to fraction form
    18,980/28,434.36 = 17,547.92/x
  3. Step 3: Cross multiply
    18,980x = 28,434.36 × 17,547.92
  4. Step 4: Simplify right side
    18,980x = 498,963,874.53
  5. Step 5: Solve for x
    x = 498,963,874.53/18,980
  6. Step 6: Final answer
    x = 26,288.93

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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.