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Finding the Fourth Proportional to 9,999.72, 14,955.84 and 6,989.04

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Solution

The fourth proportional to 9,999.72, 14,955.84 and 6,989.04 is: 10,452.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.72 : 14,955.84 = 6,989.04 : x
  2. Step 2: Convert to fraction form
    9,999.72/14,955.84 = 6,989.04/x
  3. Step 3: Cross multiply
    9,999.72x = 14,955.84 × 6,989.04
  4. Step 4: Simplify right side
    9,999.72x = 104,526,963.99
  5. Step 5: Solve for x
    x = 104,526,963.99/9,999.72
  6. Step 6: Final answer
    x = 10,452.99

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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.