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Finding the Fourth Proportional to 9,907.81, 13,660.81 and 8,560.98

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Solution

The fourth proportional to 9,907.81, 13,660.81 and 8,560.98 is: 11,803.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,907.81 : 13,660.81 = 8,560.98 : x
  2. Step 2: Convert to fraction form
    9,907.81/13,660.81 = 8,560.98/x
  3. Step 3: Cross multiply
    9,907.81x = 13,660.81 × 8,560.98
  4. Step 4: Simplify right side
    9,907.81x = 116,949,921.19
  5. Step 5: Solve for x
    x = 116,949,921.19/9,907.81
  6. Step 6: Final answer
    x = 11,803.81

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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.