Home / 20,869.71-28,800.93-11,438.27

Finding the Fourth Proportional to 20,869.71, 28,800.93 and 11,438.27

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Solution

The fourth proportional to 20,869.71, 28,800.93 and 11,438.27 is: 15,785.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.71 : 28,800.93 = 11,438.27 : x
  2. Step 2: Convert to fraction form
    20,869.71/28,800.93 = 11,438.27/x
  3. Step 3: Cross multiply
    20,869.71x = 28,800.93 × 11,438.27
  4. Step 4: Simplify right side
    20,869.71x = 329,432,813.59
  5. Step 5: Solve for x
    x = 329,432,813.59/20,869.71
  6. Step 6: Final answer
    x = 15,785.21

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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.