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Finding the Fourth Proportional to 18,916.83, 28,312.83 and 10,470.33

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Solution

The fourth proportional to 18,916.83, 28,312.83 and 10,470.33 is: 15,670.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.83 : 28,312.83 = 10,470.33 : x
  2. Step 2: Convert to fraction form
    18,916.83/28,312.83 = 10,470.33/x
  3. Step 3: Cross multiply
    18,916.83x = 28,312.83 × 10,470.33
  4. Step 4: Simplify right side
    18,916.83x = 296,444,673.33
  5. Step 5: Solve for x
    x = 296,444,673.33/18,916.83
  6. Step 6: Final answer
    x = 15,670.95

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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.