Home / 13,521.12-18,655.86-8,216.16

Finding the Fourth Proportional to 13,521.12, 18,655.86 and 8,216.16

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Solution

The fourth proportional to 13,521.12, 18,655.86 and 8,216.16 is: 11,336.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.12 : 18,655.86 = 8,216.16 : x
  2. Step 2: Convert to fraction form
    13,521.12/18,655.86 = 8,216.16/x
  3. Step 3: Cross multiply
    13,521.12x = 18,655.86 × 8,216.16
  4. Step 4: Simplify right side
    13,521.12x = 153,279,530.70
  5. Step 5: Solve for x
    x = 153,279,530.70/13,521.12
  6. Step 6: Final answer
    x = 11,336.30

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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.