Home / 20,890.69-28,829.01-11,330.55

Finding the Fourth Proportional to 20,890.69, 28,829.01 and 11,330.55

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Solution

The fourth proportional to 20,890.69, 28,829.01 and 11,330.55 is: 15,636.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.69 : 28,829.01 = 11,330.55 : x
  2. Step 2: Convert to fraction form
    20,890.69/28,829.01 = 11,330.55/x
  3. Step 3: Cross multiply
    20,890.69x = 28,829.01 × 11,330.55
  4. Step 4: Simplify right side
    20,890.69x = 326,648,486.14
  5. Step 5: Solve for x
    x = 326,648,486.14/20,890.69
  6. Step 6: Final answer
    x = 15,636.08

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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.