Home / 13,631.40-18,811.24-7,970.04

Finding the Fourth Proportional to 13,631.40, 18,811.24 and 7,970.04

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Solution

The fourth proportional to 13,631.40, 18,811.24 and 7,970.04 is: 10,998.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.40 : 18,811.24 = 7,970.04 : x
  2. Step 2: Convert to fraction form
    13,631.40/18,811.24 = 7,970.04/x
  3. Step 3: Cross multiply
    13,631.40x = 18,811.24 × 7,970.04
  4. Step 4: Simplify right side
    13,631.40x = 149,926,335.25
  5. Step 5: Solve for x
    x = 149,926,335.25/13,631.40
  6. Step 6: Final answer
    x = 10,998.60

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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.