Home / 13,216.16-18,231.36-7,909.40

Finding the Fourth Proportional to 13,216.16, 18,231.36 and 7,909.40

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Solution

The fourth proportional to 13,216.16, 18,231.36 and 7,909.40 is: 10,910.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,216.16 : 18,231.36 = 7,909.40 : x
  2. Step 2: Convert to fraction form
    13,216.16/18,231.36 = 7,909.40/x
  3. Step 3: Cross multiply
    13,216.16x = 18,231.36 × 7,909.40
  4. Step 4: Simplify right side
    13,216.16x = 144,199,118.78
  5. Step 5: Solve for x
    x = 144,199,118.78/13,216.16
  6. Step 6: Final answer
    x = 10,910.82

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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.