Home / 15,289.56-21,099.81-8,915.97

Finding the Fourth Proportional to 15,289.56, 21,099.81 and 8,915.97

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Solution

The fourth proportional to 15,289.56, 21,099.81 and 8,915.97 is: 12,304.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,289.56 : 21,099.81 = 8,915.97 : x
  2. Step 2: Convert to fraction form
    15,289.56/21,099.81 = 8,915.97/x
  3. Step 3: Cross multiply
    15,289.56x = 21,099.81 × 8,915.97
  4. Step 4: Simplify right side
    15,289.56x = 188,125,272.97
  5. Step 5: Solve for x
    x = 188,125,272.97/15,289.56
  6. Step 6: Final answer
    x = 12,304.17

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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.