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Finding the Fourth Proportional to 47,277.20, 70,915.80 and 20,984.60

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Solution

The fourth proportional to 47,277.20, 70,915.80 and 20,984.60 is: 31,476.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,277.20 : 70,915.80 = 20,984.60 : x
  2. Step 2: Convert to fraction form
    47,277.20/70,915.80 = 20,984.60/x
  3. Step 3: Cross multiply
    47,277.20x = 70,915.80 × 20,984.60
  4. Step 4: Simplify right side
    47,277.20x = 1,488,139,696.68
  5. Step 5: Solve for x
    x = 1,488,139,696.68/47,277.20
  6. Step 6: Final answer
    x = 31,476.90

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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.