Home / 12,827.21-17,708.91-9,778.40

Finding the Fourth Proportional to 12,827.21, 17,708.91 and 9,778.40

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Solution

The fourth proportional to 12,827.21, 17,708.91 and 9,778.40 is: 13,499.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,827.21 : 17,708.91 = 9,778.40 : x
  2. Step 2: Convert to fraction form
    12,827.21/17,708.91 = 9,778.40/x
  3. Step 3: Cross multiply
    12,827.21x = 17,708.91 × 9,778.40
  4. Step 4: Simplify right side
    12,827.21x = 173,164,717.00
  5. Step 5: Solve for x
    x = 173,164,717.00/12,827.21
  6. Step 6: Final answer
    x = 13,499.80

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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.