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Finding the Fourth Proportional to 18,636.52, 25,718.88 and 10,139.17

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Solution

The fourth proportional to 18,636.52, 25,718.88 and 10,139.17 is: 13,992.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.52 : 25,718.88 = 10,139.17 : x
  2. Step 2: Convert to fraction form
    18,636.52/25,718.88 = 10,139.17/x
  3. Step 3: Cross multiply
    18,636.52x = 25,718.88 × 10,139.17
  4. Step 4: Simplify right side
    18,636.52x = 260,768,096.53
  5. Step 5: Solve for x
    x = 260,768,096.53/18,636.52
  6. Step 6: Final answer
    x = 13,992.32

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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.