Home / 31,447.20-47,181.60-13,929.60

Finding the Fourth Proportional to 31,447.20, 47,181.60 and 13,929.60

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Solution

The fourth proportional to 31,447.20, 47,181.60 and 13,929.60 is: 20,899.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,447.20 : 47,181.60 = 13,929.60 : x
  2. Step 2: Convert to fraction form
    31,447.20/47,181.60 = 13,929.60/x
  3. Step 3: Cross multiply
    31,447.20x = 47,181.60 × 13,929.60
  4. Step 4: Simplify right side
    31,447.20x = 657,220,815.36
  5. Step 5: Solve for x
    x = 657,220,815.36/31,447.20
  6. Step 6: Final answer
    x = 20,899.18

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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.