Home / 15,289.28-21,099.28-9,980.96

Finding the Fourth Proportional to 15,289.28, 21,099.28 and 9,980.96

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Solution

The fourth proportional to 15,289.28, 21,099.28 and 9,980.96 is: 13,773.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.28 : 21,099.28 = 9,980.96 : x
  2. Step 2: Convert to fraction form
    15,289.28/21,099.28 = 9,980.96/x
  3. Step 3: Cross multiply
    15,289.28x = 21,099.28 × 9,980.96
  4. Step 4: Simplify right side
    15,289.28x = 210,591,069.71
  5. Step 5: Solve for x
    x = 210,591,069.71/15,289.28
  6. Step 6: Final answer
    x = 13,773.77

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Similar ratio
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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.