Home / 13,368.28-20,030.52-7,121.70

Finding the Fourth Proportional to 13,368.28, 20,030.52 and 7,121.70

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Solution

The fourth proportional to 13,368.28, 20,030.52 and 7,121.70 is: 10,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.28 : 20,030.52 = 7,121.70 : x
  2. Step 2: Convert to fraction form
    13,368.28/20,030.52 = 7,121.70/x
  3. Step 3: Cross multiply
    13,368.28x = 20,030.52 × 7,121.70
  4. Step 4: Simplify right side
    13,368.28x = 142,651,354.28
  5. Step 5: Solve for x
    x = 142,651,354.28/13,368.28
  6. Step 6: Final answer
    x = 10,670.88

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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.