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Finding the Fourth Proportional to 18,696.75, 28,036.90 and 7,001.76

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Solution

The fourth proportional to 18,696.75, 28,036.90 and 7,001.76 is: 10,499.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.75 : 28,036.90 = 7,001.76 : x
  2. Step 2: Convert to fraction form
    18,696.75/28,036.90 = 7,001.76/x
  3. Step 3: Cross multiply
    18,696.75x = 28,036.90 × 7,001.76
  4. Step 4: Simplify right side
    18,696.75x = 196,307,758.83
  5. Step 5: Solve for x
    x = 196,307,758.83/18,696.75
  6. Step 6: Final answer
    x = 10,499.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.