Home / 8,421.80-11,622.15-4,645.10

Finding the Fourth Proportional to 8,421.80, 11,622.15 and 4,645.10

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Solution

The fourth proportional to 8,421.80, 11,622.15 and 4,645.10 is: 6,410.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.80 : 11,622.15 = 4,645.10 : x
  2. Step 2: Convert to fraction form
    8,421.80/11,622.15 = 4,645.10/x
  3. Step 3: Cross multiply
    8,421.80x = 11,622.15 × 4,645.10
  4. Step 4: Simplify right side
    8,421.80x = 53,986,048.97
  5. Step 5: Solve for x
    x = 53,986,048.97/8,421.80
  6. Step 6: Final answer
    x = 6,410.27

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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.