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Finding the Fourth Proportional to 8,698.70, 12,943.40 and 8,669.54

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Solution

The fourth proportional to 8,698.70, 12,943.40 and 8,669.54 is: 12,900.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,698.70 : 12,943.40 = 8,669.54 : x
  2. Step 2: Convert to fraction form
    8,698.70/12,943.40 = 8,669.54/x
  3. Step 3: Cross multiply
    8,698.70x = 12,943.40 × 8,669.54
  4. Step 4: Simplify right side
    8,698.70x = 112,213,215.97
  5. Step 5: Solve for x
    x = 112,213,215.97/8,698.70
  6. Step 6: Final answer
    x = 12,900.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.