Home / 15,405.11-21,259.13-8,331.59

Finding the Fourth Proportional to 15,405.11, 21,259.13 and 8,331.59

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Solution

The fourth proportional to 15,405.11, 21,259.13 and 8,331.59 is: 11,497.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.11 : 21,259.13 = 8,331.59 : x
  2. Step 2: Convert to fraction form
    15,405.11/21,259.13 = 8,331.59/x
  3. Step 3: Cross multiply
    15,405.11x = 21,259.13 × 8,331.59
  4. Step 4: Simplify right side
    15,405.11x = 177,122,366.41
  5. Step 5: Solve for x
    x = 177,122,366.41/15,405.11
  6. Step 6: Final answer
    x = 11,497.64

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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.