Home / 10,405.09-15,605.60-8,661.30

Finding the Fourth Proportional to 10,405.09, 15,605.60 and 8,661.30

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Solution

The fourth proportional to 10,405.09, 15,605.60 and 8,661.30 is: 12,990.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,405.09 : 15,605.60 = 8,661.30 : x
  2. Step 2: Convert to fraction form
    10,405.09/15,605.60 = 8,661.30/x
  3. Step 3: Cross multiply
    10,405.09x = 15,605.60 × 8,661.30
  4. Step 4: Simplify right side
    10,405.09x = 135,164,783.28
  5. Step 5: Solve for x
    x = 135,164,783.28/10,405.09
  6. Step 6: Final answer
    x = 12,990.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.