Home / 8,421.77-11,622.71-4,645.28

Finding the Fourth Proportional to 8,421.77, 11,622.71 and 4,645.28

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Solution

The fourth proportional to 8,421.77, 11,622.71 and 4,645.28 is: 6,410.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.77 : 11,622.71 = 4,645.28 : x
  2. Step 2: Convert to fraction form
    8,421.77/11,622.71 = 4,645.28/x
  3. Step 3: Cross multiply
    8,421.77x = 11,622.71 × 4,645.28
  4. Step 4: Simplify right side
    8,421.77x = 53,990,742.31
  5. Step 5: Solve for x
    x = 53,990,742.31/8,421.77
  6. Step 6: Final answer
    x = 6,410.85

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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.