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Finding the Fourth Proportional to 9,989.61, 13,781.46 and 7,007.39

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Solution

The fourth proportional to 9,989.61, 13,781.46 and 7,007.39 is: 9,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.61 : 13,781.46 = 7,007.39 : x
  2. Step 2: Convert to fraction form
    9,989.61/13,781.46 = 7,007.39/x
  3. Step 3: Cross multiply
    9,989.61x = 13,781.46 × 7,007.39
  4. Step 4: Simplify right side
    9,989.61x = 96,572,064.99
  5. Step 5: Solve for x
    x = 96,572,064.99/9,989.61
  6. Step 6: Final answer
    x = 9,667.25

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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.