Home / 8,421.21-12,634.65-5,297.58

Finding the Fourth Proportional to 8,421.21, 12,634.65 and 5,297.58

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Solution

The fourth proportional to 8,421.21, 12,634.65 and 5,297.58 is: 7,948.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.21 : 12,634.65 = 5,297.58 : x
  2. Step 2: Convert to fraction form
    8,421.21/12,634.65 = 5,297.58/x
  3. Step 3: Cross multiply
    8,421.21x = 12,634.65 × 5,297.58
  4. Step 4: Simplify right side
    8,421.21x = 66,933,069.15
  5. Step 5: Solve for x
    x = 66,933,069.15/8,421.21
  6. Step 6: Final answer
    x = 7,948.15

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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.