Home / 19,486.40-26,890.20-10,988.72

Finding the Fourth Proportional to 19,486.40, 26,890.20 and 10,988.72

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Solution

The fourth proportional to 19,486.40, 26,890.20 and 10,988.72 is: 15,163.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,486.40 : 26,890.20 = 10,988.72 : x
  2. Step 2: Convert to fraction form
    19,486.40/26,890.20 = 10,988.72/x
  3. Step 3: Cross multiply
    19,486.40x = 26,890.20 × 10,988.72
  4. Step 4: Simplify right side
    19,486.40x = 295,488,878.54
  5. Step 5: Solve for x
    x = 295,488,878.54/19,486.40
  6. Step 6: Final answer
    x = 15,163.85

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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.