Home / 47,986.40-71,979.60-31,365.20

Finding the Fourth Proportional to 47,986.40, 71,979.60 and 31,365.20

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Solution

The fourth proportional to 47,986.40, 71,979.60 and 31,365.20 is: 47,047.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,986.40 : 71,979.60 = 31,365.20 : x
  2. Step 2: Convert to fraction form
    47,986.40/71,979.60 = 31,365.20/x
  3. Step 3: Cross multiply
    47,986.40x = 71,979.60 × 31,365.20
  4. Step 4: Simplify right side
    47,986.40x = 2,257,654,549.92
  5. Step 5: Solve for x
    x = 2,257,654,549.92/47,986.40
  6. Step 6: Final answer
    x = 47,047.80

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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.