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Finding the Fourth Proportional to 18,636.66, 25,719.06 and 10,139.27

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Solution

The fourth proportional to 18,636.66, 25,719.06 and 10,139.27 is: 13,992.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.66 : 25,719.06 = 10,139.27 : x
  2. Step 2: Convert to fraction form
    18,636.66/25,719.06 = 10,139.27/x
  3. Step 3: Cross multiply
    18,636.66x = 25,719.06 × 10,139.27
  4. Step 4: Simplify right side
    18,636.66x = 260,772,364.89
  5. Step 5: Solve for x
    x = 260,772,364.89/18,636.66
  6. Step 6: Final answer
    x = 13,992.44

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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.