Home / 10,915.20-16,368.80-3,521.60

Finding the Fourth Proportional to 10,915.20, 16,368.80 and 3,521.60

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Solution

The fourth proportional to 10,915.20, 16,368.80 and 3,521.60 is: 5,281.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,915.20 : 16,368.80 = 3,521.60 : x
  2. Step 2: Convert to fraction form
    10,915.20/16,368.80 = 3,521.60/x
  3. Step 3: Cross multiply
    10,915.20x = 16,368.80 × 3,521.60
  4. Step 4: Simplify right side
    10,915.20x = 57,644,366.08
  5. Step 5: Solve for x
    x = 57,644,366.08/10,915.20
  6. Step 6: Final answer
    x = 5,281.11

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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.