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Finding the Fourth Proportional to 10,720, 14,793.64 and 6,994

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Solution

The fourth proportional to 10,720, 14,793.64 and 6,994 is: 9,651.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,720 : 14,793.64 = 6,994 : x
  2. Step 2: Convert to fraction form
    10,720/14,793.64 = 6,994/x
  3. Step 3: Cross multiply
    10,720x = 14,793.64 × 6,994
  4. Step 4: Simplify right side
    10,720x = 103,466,718.16
  5. Step 5: Solve for x
    x = 103,466,718.16/10,720
  6. Step 6: Final answer
    x = 9,651.75

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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.