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Finding the Fourth Proportional to 19,488.65, 26,904.69 and 15,618.20

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Solution

The fourth proportional to 19,488.65, 26,904.69 and 15,618.20 is: 21,561.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,488.65 : 26,904.69 = 15,618.20 : x
  2. Step 2: Convert to fraction form
    19,488.65/26,904.69 = 15,618.20/x
  3. Step 3: Cross multiply
    19,488.65x = 26,904.69 × 15,618.20
  4. Step 4: Simplify right side
    19,488.65x = 420,202,694.83
  5. Step 5: Solve for x
    x = 420,202,694.83/19,488.65
  6. Step 6: Final answer
    x = 21,561.41

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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.