Home / 12,421.08-17,132.41-8,435.28

Finding the Fourth Proportional to 12,421.08, 17,132.41 and 8,435.28

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Solution

The fourth proportional to 12,421.08, 17,132.41 and 8,435.28 is: 11,634.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.08 : 17,132.41 = 8,435.28 : x
  2. Step 2: Convert to fraction form
    12,421.08/17,132.41 = 8,435.28/x
  3. Step 3: Cross multiply
    12,421.08x = 17,132.41 × 8,435.28
  4. Step 4: Simplify right side
    12,421.08x = 144,516,675.42
  5. Step 5: Solve for x
    x = 144,516,675.42/12,421.08
  6. Step 6: Final answer
    x = 11,634.79

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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.