Home / 21,007.22-28,988.60-11,575.79

Finding the Fourth Proportional to 21,007.22, 28,988.60 and 11,575.79

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Solution

The fourth proportional to 21,007.22, 28,988.60 and 11,575.79 is: 15,973.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.22 : 28,988.60 = 11,575.79 : x
  2. Step 2: Convert to fraction form
    21,007.22/28,988.60 = 11,575.79/x
  3. Step 3: Cross multiply
    21,007.22x = 28,988.60 × 11,575.79
  4. Step 4: Simplify right side
    21,007.22x = 335,565,829.99
  5. Step 5: Solve for x
    x = 335,565,829.99/21,007.22
  6. Step 6: Final answer
    x = 15,973.83

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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.