Home / 21,140.28-31,709.61-5,557.50

Finding the Fourth Proportional to 21,140.28, 31,709.61 and 5,557.50

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Solution

The fourth proportional to 21,140.28, 31,709.61 and 5,557.50 is: 8,336.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.28 : 31,709.61 = 5,557.50 : x
  2. Step 2: Convert to fraction form
    21,140.28/31,709.61 = 5,557.50/x
  3. Step 3: Cross multiply
    21,140.28x = 31,709.61 × 5,557.50
  4. Step 4: Simplify right side
    21,140.28x = 176,226,157.58
  5. Step 5: Solve for x
    x = 176,226,157.58/21,140.28
  6. Step 6: Final answer
    x = 8,336.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.