Home / 14,069.28-21,115.44-7,145.76

Finding the Fourth Proportional to 14,069.28, 21,115.44 and 7,145.76

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Solution

The fourth proportional to 14,069.28, 21,115.44 and 7,145.76 is: 10,724.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,069.28 : 21,115.44 = 7,145.76 : x
  2. Step 2: Convert to fraction form
    14,069.28/21,115.44 = 7,145.76/x
  3. Step 3: Cross multiply
    14,069.28x = 21,115.44 × 7,145.76
  4. Step 4: Simplify right side
    14,069.28x = 150,885,866.53
  5. Step 5: Solve for x
    x = 150,885,866.53/14,069.28
  6. Step 6: Final answer
    x = 10,724.49

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Double scale
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1.5x scale

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.