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Finding the Fourth Proportional to 18,889.90, 28,341.02 and 9,029.95

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Solution

The fourth proportional to 18,889.90, 28,341.02 and 9,029.95 is: 13,547.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.90 : 28,341.02 = 9,029.95 : x
  2. Step 2: Convert to fraction form
    18,889.90/28,341.02 = 9,029.95/x
  3. Step 3: Cross multiply
    18,889.90x = 28,341.02 × 9,029.95
  4. Step 4: Simplify right side
    18,889.90x = 255,917,945.27
  5. Step 5: Solve for x
    x = 255,917,945.27/18,889.90
  6. Step 6: Final answer
    x = 13,547.87

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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.