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Finding the Fourth Proportional to 8,415.64, 12,588.76 and 6,917.99

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Solution

The fourth proportional to 8,415.64, 12,588.76 and 6,917.99 is: 10,348.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.64 : 12,588.76 = 6,917.99 : x
  2. Step 2: Convert to fraction form
    8,415.64/12,588.76 = 6,917.99/x
  3. Step 3: Cross multiply
    8,415.64x = 12,588.76 × 6,917.99
  4. Step 4: Simplify right side
    8,415.64x = 87,088,881.20
  5. Step 5: Solve for x
    x = 87,088,881.20/8,415.64
  6. Step 6: Final answer
    x = 10,348.46

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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.