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Finding the Fourth Proportional to 9,915.80, 14,882.10 and 4,076.60

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Solution

The fourth proportional to 9,915.80, 14,882.10 and 4,076.60 is: 6,118.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.80 : 14,882.10 = 4,076.60 : x
  2. Step 2: Convert to fraction form
    9,915.80/14,882.10 = 4,076.60/x
  3. Step 3: Cross multiply
    9,915.80x = 14,882.10 × 4,076.60
  4. Step 4: Simplify right side
    9,915.80x = 60,668,368.86
  5. Step 5: Solve for x
    x = 60,668,368.86/9,915.80
  6. Step 6: Final answer
    x = 6,118.35

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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.