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Finding the Fourth Proportional to 9,986.25, 13,781.03 and 5,570.25

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Solution

The fourth proportional to 9,986.25, 13,781.03 and 5,570.25 is: 7,686.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.25 : 13,781.03 = 5,570.25 : x
  2. Step 2: Convert to fraction form
    9,986.25/13,781.03 = 5,570.25/x
  3. Step 3: Cross multiply
    9,986.25x = 13,781.03 × 5,570.25
  4. Step 4: Simplify right side
    9,986.25x = 76,763,754.51
  5. Step 5: Solve for x
    x = 76,763,754.51/9,986.25
  6. Step 6: Final answer
    x = 7,686.95

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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.