Home / 8,420.22-12,629.52-5,648.40

Finding the Fourth Proportional to 8,420.22, 12,629.52 and 5,648.40

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Solution

The fourth proportional to 8,420.22, 12,629.52 and 5,648.40 is: 8,472.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.22 : 12,629.52 = 5,648.40 : x
  2. Step 2: Convert to fraction form
    8,420.22/12,629.52 = 5,648.40/x
  3. Step 3: Cross multiply
    8,420.22x = 12,629.52 × 5,648.40
  4. Step 4: Simplify right side
    8,420.22x = 71,336,580.77
  5. Step 5: Solve for x
    x = 71,336,580.77/8,420.22
  6. Step 6: Final answer
    x = 8,472.06

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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.