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Finding the Fourth Proportional to 12,987.56, 17,923.74 and 7,398.56

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Solution

The fourth proportional to 12,987.56, 17,923.74 and 7,398.56 is: 10,210.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.56 : 17,923.74 = 7,398.56 : x
  2. Step 2: Convert to fraction form
    12,987.56/17,923.74 = 7,398.56/x
  3. Step 3: Cross multiply
    12,987.56x = 17,923.74 × 7,398.56
  4. Step 4: Simplify right side
    12,987.56x = 132,609,865.81
  5. Step 5: Solve for x
    x = 132,609,865.81/12,987.56
  6. Step 6: Final answer
    x = 10,210.53

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.