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Finding the Fourth Proportional to 13,275.97, 19,870.21 and 11,817.97

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Solution

The fourth proportional to 13,275.97, 19,870.21 and 11,817.97 is: 17,688.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,275.97 : 19,870.21 = 11,817.97 : x
  2. Step 2: Convert to fraction form
    13,275.97/19,870.21 = 11,817.97/x
  3. Step 3: Cross multiply
    13,275.97x = 19,870.21 × 11,817.97
  4. Step 4: Simplify right side
    13,275.97x = 234,825,545.67
  5. Step 5: Solve for x
    x = 234,825,545.67/13,275.97
  6. Step 6: Final answer
    x = 17,688.01

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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.