Home / 13,545.79-18,696.94-7,881.63

Finding the Fourth Proportional to 13,545.79, 18,696.94 and 7,881.63

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Solution

The fourth proportional to 13,545.79, 18,696.94 and 7,881.63 is: 10,878.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,545.79 : 18,696.94 = 7,881.63 : x
  2. Step 2: Convert to fraction form
    13,545.79/18,696.94 = 7,881.63/x
  3. Step 3: Cross multiply
    13,545.79x = 18,696.94 × 7,881.63
  4. Step 4: Simplify right side
    13,545.79x = 147,362,269.73
  5. Step 5: Solve for x
    x = 147,362,269.73/13,545.79
  6. Step 6: Final answer
    x = 10,878.83

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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.