Home / 8,421.86-11,621.52-4,645.16

Finding the Fourth Proportional to 8,421.86, 11,621.52 and 4,645.16

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Solution

The fourth proportional to 8,421.86, 11,621.52 and 4,645.16 is: 6,409.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.86 : 11,621.52 = 4,645.16 : x
  2. Step 2: Convert to fraction form
    8,421.86/11,621.52 = 4,645.16/x
  3. Step 3: Cross multiply
    8,421.86x = 11,621.52 × 4,645.16
  4. Step 4: Simplify right side
    8,421.86x = 53,983,857.62
  5. Step 5: Solve for x
    x = 53,983,857.62/8,421.86
  6. Step 6: Final answer
    x = 6,409.97

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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.