Home / 20,889.69-28,829.28-11,458.45

Finding the Fourth Proportional to 20,889.69, 28,829.28 and 11,458.45

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Solution

The fourth proportional to 20,889.69, 28,829.28 and 11,458.45 is: 15,813.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.69 : 28,829.28 = 11,458.45 : x
  2. Step 2: Convert to fraction form
    20,889.69/28,829.28 = 11,458.45/x
  3. Step 3: Cross multiply
    20,889.69x = 28,829.28 × 11,458.45
  4. Step 4: Simplify right side
    20,889.69x = 330,338,863.42
  5. Step 5: Solve for x
    x = 330,338,863.42/20,889.69
  6. Step 6: Final answer
    x = 15,813.49

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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.