Home / 13,665.14-18,866.61-11,153.25

Finding the Fourth Proportional to 13,665.14, 18,866.61 and 11,153.25

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Solution

The fourth proportional to 13,665.14, 18,866.61 and 11,153.25 is: 15,398.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.14 : 18,866.61 = 11,153.25 : x
  2. Step 2: Convert to fraction form
    13,665.14/18,866.61 = 11,153.25/x
  3. Step 3: Cross multiply
    13,665.14x = 18,866.61 × 11,153.25
  4. Step 4: Simplify right side
    13,665.14x = 210,424,017.98
  5. Step 5: Solve for x
    x = 210,424,017.98/13,665.14
  6. Step 6: Final answer
    x = 15,398.60

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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.