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Finding the Fourth Proportional to 19,696.99, 27,191.87 and 15,210.67

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Solution

The fourth proportional to 19,696.99, 27,191.87 and 15,210.67 is: 20,998.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,696.99 : 27,191.87 = 15,210.67 : x
  2. Step 2: Convert to fraction form
    19,696.99/27,191.87 = 15,210.67/x
  3. Step 3: Cross multiply
    19,696.99x = 27,191.87 × 15,210.67
  4. Step 4: Simplify right side
    19,696.99x = 413,606,561.25
  5. Step 5: Solve for x
    x = 413,606,561.25/19,696.99
  6. Step 6: Final answer
    x = 20,998.47

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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.