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Finding the Fourth Proportional to 9,989.64, 14,992.02 and 5,610.78

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Solution

The fourth proportional to 9,989.64, 14,992.02 and 5,610.78 is: 8,420.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.64 : 14,992.02 = 5,610.78 : x
  2. Step 2: Convert to fraction form
    9,989.64/14,992.02 = 5,610.78/x
  3. Step 3: Cross multiply
    9,989.64x = 14,992.02 × 5,610.78
  4. Step 4: Simplify right side
    9,989.64x = 84,116,925.98
  5. Step 5: Solve for x
    x = 84,116,925.98/9,989.64
  6. Step 6: Final answer
    x = 8,420.42

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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.