Home / 20,973.71-28,944.21-11,899.69

Finding the Fourth Proportional to 20,973.71, 28,944.21 and 11,899.69

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Solution

The fourth proportional to 20,973.71, 28,944.21 and 11,899.69 is: 16,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.71 : 28,944.21 = 11,899.69 : x
  2. Step 2: Convert to fraction form
    20,973.71/28,944.21 = 11,899.69/x
  3. Step 3: Cross multiply
    20,973.71x = 28,944.21 × 11,899.69
  4. Step 4: Simplify right side
    20,973.71x = 344,426,981.57
  5. Step 5: Solve for x
    x = 344,426,981.57/20,973.71
  6. Step 6: Final answer
    x = 16,421.84

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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.