Home / 13,177.72-18,182.28-7,871.50

Finding the Fourth Proportional to 13,177.72, 18,182.28 and 7,871.50

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Solution

The fourth proportional to 13,177.72, 18,182.28 and 7,871.50 is: 10,860.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,177.72 : 18,182.28 = 7,871.50 : x
  2. Step 2: Convert to fraction form
    13,177.72/18,182.28 = 7,871.50/x
  3. Step 3: Cross multiply
    13,177.72x = 18,182.28 × 7,871.50
  4. Step 4: Simplify right side
    13,177.72x = 143,121,817.02
  5. Step 5: Solve for x
    x = 143,121,817.02/13,177.72
  6. Step 6: Final answer
    x = 10,860.89

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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.