Home / 13,288.29-18,320.73-10,889.47

Finding the Fourth Proportional to 13,288.29, 18,320.73 and 10,889.47

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Solution

The fourth proportional to 13,288.29, 18,320.73 and 10,889.47 is: 15,013.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,288.29 : 18,320.73 = 10,889.47 : x
  2. Step 2: Convert to fraction form
    13,288.29/18,320.73 = 10,889.47/x
  3. Step 3: Cross multiply
    13,288.29x = 18,320.73 × 10,889.47
  4. Step 4: Simplify right side
    13,288.29x = 199,503,083.03
  5. Step 5: Solve for x
    x = 199,503,083.03/13,288.29
  6. Step 6: Final answer
    x = 15,013.45

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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.