Home / 15,405.57-21,259.67-8,331.99

Finding the Fourth Proportional to 15,405.57, 21,259.67 and 8,331.99

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Solution

The fourth proportional to 15,405.57, 21,259.67 and 8,331.99 is: 11,498.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.57 : 21,259.67 = 8,331.99 : x
  2. Step 2: Convert to fraction form
    15,405.57/21,259.67 = 8,331.99/x
  3. Step 3: Cross multiply
    15,405.57x = 21,259.67 × 8,331.99
  4. Step 4: Simplify right side
    15,405.57x = 177,135,316.18
  5. Step 5: Solve for x
    x = 177,135,316.18/15,405.57
  6. Step 6: Final answer
    x = 11,498.13

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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.