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Finding the Fourth Proportional to 18,683.52, 25,785.08 and 13,959.60

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Solution

The fourth proportional to 18,683.52, 25,785.08 and 13,959.60 is: 19,265.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,683.52 : 25,785.08 = 13,959.60 : x
  2. Step 2: Convert to fraction form
    18,683.52/25,785.08 = 13,959.60/x
  3. Step 3: Cross multiply
    18,683.52x = 25,785.08 × 13,959.60
  4. Step 4: Simplify right side
    18,683.52x = 359,949,402.77
  5. Step 5: Solve for x
    x = 359,949,402.77/18,683.52
  6. Step 6: Final answer
    x = 19,265.61

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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.