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Finding the Fourth Proportional to 18,866.64, 28,300.02 and 6,386.79

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Solution

The fourth proportional to 18,866.64, 28,300.02 and 6,386.79 is: 9,580.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,866.64 : 28,300.02 = 6,386.79 : x
  2. Step 2: Convert to fraction form
    18,866.64/28,300.02 = 6,386.79/x
  3. Step 3: Cross multiply
    18,866.64x = 28,300.02 × 6,386.79
  4. Step 4: Simplify right side
    18,866.64x = 180,746,284.74
  5. Step 5: Solve for x
    x = 180,746,284.74/18,866.64
  6. Step 6: Final answer
    x = 9,580.21

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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.