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Finding the Fourth Proportional to 12,887.15, 17,785.62 and 7,223.45

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Solution

The fourth proportional to 12,887.15, 17,785.62 and 7,223.45 is: 9,969.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.15 : 17,785.62 = 7,223.45 : x
  2. Step 2: Convert to fraction form
    12,887.15/17,785.62 = 7,223.45/x
  3. Step 3: Cross multiply
    12,887.15x = 17,785.62 × 7,223.45
  4. Step 4: Simplify right side
    12,887.15x = 128,473,447.86
  5. Step 5: Solve for x
    x = 128,473,447.86/12,887.15
  6. Step 6: Final answer
    x = 9,969.12

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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.