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Finding the Fourth Proportional to 22,771.71, 31,430.60 and 15,515.81

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Solution

The fourth proportional to 22,771.71, 31,430.60 and 15,515.81 is: 21,415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,771.71 : 31,430.60 = 15,515.81 : x
  2. Step 2: Convert to fraction form
    22,771.71/31,430.60 = 15,515.81/x
  3. Step 3: Cross multiply
    22,771.71x = 31,430.60 × 15,515.81
  4. Step 4: Simplify right side
    22,771.71x = 487,670,983.05
  5. Step 5: Solve for x
    x = 487,670,983.05/22,771.71
  6. Step 6: Final answer
    x = 21,415.65

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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.