Home / 15,405.37-21,259.37-8,331.77

Finding the Fourth Proportional to 15,405.37, 21,259.37 and 8,331.77

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Solution

The fourth proportional to 15,405.37, 21,259.37 and 8,331.77 is: 11,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.37 : 21,259.37 = 8,331.77 : x
  2. Step 2: Convert to fraction form
    15,405.37/21,259.37 = 8,331.77/x
  3. Step 3: Cross multiply
    15,405.37x = 21,259.37 × 8,331.77
  4. Step 4: Simplify right side
    15,405.37x = 177,128,139.53
  5. Step 5: Solve for x
    x = 177,128,139.53/15,405.37
  6. Step 6: Final answer
    x = 11,497.82

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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.