Home / 13,281.12-18,327.12-7,974.72

Finding the Fourth Proportional to 13,281.12, 18,327.12 and 7,974.72

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Solution

The fourth proportional to 13,281.12, 18,327.12 and 7,974.72 is: 11,004.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.12 : 18,327.12 = 7,974.72 : x
  2. Step 2: Convert to fraction form
    13,281.12/18,327.12 = 7,974.72/x
  3. Step 3: Cross multiply
    13,281.12x = 18,327.12 × 7,974.72
  4. Step 4: Simplify right side
    13,281.12x = 146,153,650.41
  5. Step 5: Solve for x
    x = 146,153,650.41/13,281.12
  6. Step 6: Final answer
    x = 11,004.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.