Home / 8,421.86-11,622.42-4,645.28

Finding the Fourth Proportional to 8,421.86, 11,622.42 and 4,645.28

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Solution

The fourth proportional to 8,421.86, 11,622.42 and 4,645.28 is: 6,410.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.86 : 11,622.42 = 4,645.28 : x
  2. Step 2: Convert to fraction form
    8,421.86/11,622.42 = 4,645.28/x
  3. Step 3: Cross multiply
    8,421.86x = 11,622.42 × 4,645.28
  4. Step 4: Simplify right side
    8,421.86x = 53,989,395.18
  5. Step 5: Solve for x
    x = 53,989,395.18/8,421.86
  6. Step 6: Final answer
    x = 6,410.63

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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.