Home / 8,661.08-12,991.32-2,421.05

Finding the Fourth Proportional to 8,661.08, 12,991.32 and 2,421.05

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Solution

The fourth proportional to 8,661.08, 12,991.32 and 2,421.05 is: 3,631.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,661.08 : 12,991.32 = 2,421.05 : x
  2. Step 2: Convert to fraction form
    8,661.08/12,991.32 = 2,421.05/x
  3. Step 3: Cross multiply
    8,661.08x = 12,991.32 × 2,421.05
  4. Step 4: Simplify right side
    8,661.08x = 31,452,570.33
  5. Step 5: Solve for x
    x = 31,452,570.33/8,661.08
  6. Step 6: Final answer
    x = 3,631.48

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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.