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Finding the Fourth Proportional to 56,391.71, 84,589.61 and 18,953.03

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Solution

The fourth proportional to 56,391.71, 84,589.61 and 18,953.03 is: 28,430.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,391.71 : 84,589.61 = 18,953.03 : x
  2. Step 2: Convert to fraction form
    56,391.71/84,589.61 = 18,953.03/x
  3. Step 3: Cross multiply
    56,391.71x = 84,589.61 × 18,953.03
  4. Step 4: Simplify right side
    56,391.71x = 1,603,228,898.31
  5. Step 5: Solve for x
    x = 1,603,228,898.31/56,391.71
  6. Step 6: Final answer
    x = 28,430.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.