Home / 20,859.36-28,780.14-11,903.64

Finding the Fourth Proportional to 20,859.36, 28,780.14 and 11,903.64

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Solution

The fourth proportional to 20,859.36, 28,780.14 and 11,903.64 is: 16,423.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.36 : 28,780.14 = 11,903.64 : x
  2. Step 2: Convert to fraction form
    20,859.36/28,780.14 = 11,903.64/x
  3. Step 3: Cross multiply
    20,859.36x = 28,780.14 × 11,903.64
  4. Step 4: Simplify right side
    20,859.36x = 342,588,425.71
  5. Step 5: Solve for x
    x = 342,588,425.71/20,859.36
  6. Step 6: Final answer
    x = 16,423.73

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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.