Home / 15,880.96-21,915.72-8,807.36

Finding the Fourth Proportional to 15,880.96, 21,915.72 and 8,807.36

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Solution

The fourth proportional to 15,880.96, 21,915.72 and 8,807.36 is: 12,154.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,880.96 : 21,915.72 = 8,807.36 : x
  2. Step 2: Convert to fraction form
    15,880.96/21,915.72 = 8,807.36/x
  3. Step 3: Cross multiply
    15,880.96x = 21,915.72 × 8,807.36
  4. Step 4: Simplify right side
    15,880.96x = 193,019,635.70
  5. Step 5: Solve for x
    x = 193,019,635.70/15,880.96
  6. Step 6: Final answer
    x = 12,154.15

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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.