Home / 12,420.93-17,121.45-8,435.07

Finding the Fourth Proportional to 12,420.93, 17,121.45 and 8,435.07

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Solution

The fourth proportional to 12,420.93, 17,121.45 and 8,435.07 is: 11,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.93 : 17,121.45 = 8,435.07 : x
  2. Step 2: Convert to fraction form
    12,420.93/17,121.45 = 8,435.07/x
  3. Step 3: Cross multiply
    12,420.93x = 17,121.45 × 8,435.07
  4. Step 4: Simplify right side
    12,420.93x = 144,420,629.25
  5. Step 5: Solve for x
    x = 144,420,629.25/12,420.93
  6. Step 6: Final answer
    x = 11,627.20

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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.