Home / 12,840.09-17,708.52-8,360.40

Finding the Fourth Proportional to 12,840.09, 17,708.52 and 8,360.40

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Solution

The fourth proportional to 12,840.09, 17,708.52 and 8,360.40 is: 11,530.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.09 : 17,708.52 = 8,360.40 : x
  2. Step 2: Convert to fraction form
    12,840.09/17,708.52 = 8,360.40/x
  3. Step 3: Cross multiply
    12,840.09x = 17,708.52 × 8,360.40
  4. Step 4: Simplify right side
    12,840.09x = 148,050,310.61
  5. Step 5: Solve for x
    x = 148,050,310.61/12,840.09
  6. Step 6: Final answer
    x = 11,530.32

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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.