Home / 13,126.80-18,116.74-8,347.21

Finding the Fourth Proportional to 13,126.80, 18,116.74 and 8,347.21

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Solution

The fourth proportional to 13,126.80, 18,116.74 and 8,347.21 is: 11,520.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.80 : 18,116.74 = 8,347.21 : x
  2. Step 2: Convert to fraction form
    13,126.80/18,116.74 = 8,347.21/x
  3. Step 3: Cross multiply
    13,126.80x = 18,116.74 × 8,347.21
  4. Step 4: Simplify right side
    13,126.80x = 151,224,167.14
  5. Step 5: Solve for x
    x = 151,224,167.14/13,126.80
  6. Step 6: Final answer
    x = 11,520.26

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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.