Home / 15,405.10-21,258.96-8,331.50

Finding the Fourth Proportional to 15,405.10, 21,258.96 and 8,331.50

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Solution

The fourth proportional to 15,405.10, 21,258.96 and 8,331.50 is: 11,497.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,405.10 : 21,258.96 = 8,331.50 : x
  2. Step 2: Convert to fraction form
    15,405.10/21,258.96 = 8,331.50/x
  3. Step 3: Cross multiply
    15,405.10x = 21,258.96 × 8,331.50
  4. Step 4: Simplify right side
    15,405.10x = 177,119,025.24
  5. Step 5: Solve for x
    x = 177,119,025.24/15,405.10
  6. Step 6: Final answer
    x = 11,497.43

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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.