Home / 20,869.56-28,800.50-11,438.19

Finding the Fourth Proportional to 20,869.56, 28,800.50 and 11,438.19

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Solution

The fourth proportional to 20,869.56, 28,800.50 and 11,438.19 is: 15,784.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.56 : 28,800.50 = 11,438.19 : x
  2. Step 2: Convert to fraction form
    20,869.56/28,800.50 = 11,438.19/x
  3. Step 3: Cross multiply
    20,869.56x = 28,800.50 × 11,438.19
  4. Step 4: Simplify right side
    20,869.56x = 329,425,533.90
  5. Step 5: Solve for x
    x = 329,425,533.90/20,869.56
  6. Step 6: Final answer
    x = 15,784.98

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Double scale
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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.