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Finding the Fourth Proportional to 13,615.95, 18,789.89 and 7,873.27

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Solution

The fourth proportional to 13,615.95, 18,789.89 and 7,873.27 is: 10,865.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.95 : 18,789.89 = 7,873.27 : x
  2. Step 2: Convert to fraction form
    13,615.95/18,789.89 = 7,873.27/x
  3. Step 3: Cross multiply
    13,615.95x = 18,789.89 × 7,873.27
  4. Step 4: Simplify right side
    13,615.95x = 147,937,835.19
  5. Step 5: Solve for x
    x = 147,937,835.19/13,615.95
  6. Step 6: Final answer
    x = 10,865.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.