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Finding the Fourth Proportional to 47,133.20, 70,699.80 and 20,824.40

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Solution

The fourth proportional to 47,133.20, 70,699.80 and 20,824.40 is: 31,236.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,133.20 : 70,699.80 = 20,824.40 : x
  2. Step 2: Convert to fraction form
    47,133.20/70,699.80 = 20,824.40/x
  3. Step 3: Cross multiply
    47,133.20x = 70,699.80 × 20,824.40
  4. Step 4: Simplify right side
    47,133.20x = 1,472,280,915.12
  5. Step 5: Solve for x
    x = 1,472,280,915.12/47,133.20
  6. Step 6: Final answer
    x = 31,236.60

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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.