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Finding the Fourth Proportional to 8,470.90, 11,689.50 and 4,694.12

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Solution

The fourth proportional to 8,470.90, 11,689.50 and 4,694.12 is: 6,477.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,470.90 : 11,689.50 = 4,694.12 : x
  2. Step 2: Convert to fraction form
    8,470.90/11,689.50 = 4,694.12/x
  3. Step 3: Cross multiply
    8,470.90x = 11,689.50 × 4,694.12
  4. Step 4: Simplify right side
    8,470.90x = 54,871,915.74
  5. Step 5: Solve for x
    x = 54,871,915.74/8,470.90
  6. Step 6: Final answer
    x = 6,477.70

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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.