Home / 31,918.40-47,877.60-11,139.20

Finding the Fourth Proportional to 31,918.40, 47,877.60 and 11,139.20

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Solution

The fourth proportional to 31,918.40, 47,877.60 and 11,139.20 is: 16,708.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,918.40 : 47,877.60 = 11,139.20 : x
  2. Step 2: Convert to fraction form
    31,918.40/47,877.60 = 11,139.20/x
  3. Step 3: Cross multiply
    31,918.40x = 47,877.60 × 11,139.20
  4. Step 4: Simplify right side
    31,918.40x = 533,318,161.92
  5. Step 5: Solve for x
    x = 533,318,161.92/31,918.40
  6. Step 6: Final answer
    x = 16,708.80

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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.