Home / 20,897.75-28,838.81-11,337.64

Finding the Fourth Proportional to 20,897.75, 28,838.81 and 11,337.64

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Solution

The fourth proportional to 20,897.75, 28,838.81 and 11,337.64 is: 15,645.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.75 : 28,838.81 = 11,337.64 : x
  2. Step 2: Convert to fraction form
    20,897.75/28,838.81 = 11,337.64/x
  3. Step 3: Cross multiply
    20,897.75x = 28,838.81 × 11,337.64
  4. Step 4: Simplify right side
    20,897.75x = 326,964,002.06
  5. Step 5: Solve for x
    x = 326,964,002.06/20,897.75
  6. Step 6: Final answer
    x = 15,645.89

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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.