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Finding the Fourth Proportional to 18,930.40, 26,124.84 and 10,975.12

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Solution

The fourth proportional to 18,930.40, 26,124.84 and 10,975.12 is: 15,146.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930.40 : 26,124.84 = 10,975.12 : x
  2. Step 2: Convert to fraction form
    18,930.40/26,124.84 = 10,975.12/x
  3. Step 3: Cross multiply
    18,930.40x = 26,124.84 × 10,975.12
  4. Step 4: Simplify right side
    18,930.40x = 286,723,188.67
  5. Step 5: Solve for x
    x = 286,723,188.67/18,930.40
  6. Step 6: Final answer
    x = 15,146.18

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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.