Home / 13,130.52-18,132.42-8,422.98

Finding the Fourth Proportional to 13,130.52, 18,132.42 and 8,422.98

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Solution

The fourth proportional to 13,130.52, 18,132.42 and 8,422.98 is: 11,631.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.52 : 18,132.42 = 8,422.98 : x
  2. Step 2: Convert to fraction form
    13,130.52/18,132.42 = 8,422.98/x
  3. Step 3: Cross multiply
    13,130.52x = 18,132.42 × 8,422.98
  4. Step 4: Simplify right side
    13,130.52x = 152,729,011.01
  5. Step 5: Solve for x
    x = 152,729,011.01/13,130.52
  6. Step 6: Final answer
    x = 11,631.60

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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.