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Finding the Fourth Proportional to 56,397.74, 84,615.71 and 18,961.74

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Solution

The fourth proportional to 56,397.74, 84,615.71 and 18,961.74 is: 28,449.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,397.74 : 84,615.71 = 18,961.74 : x
  2. Step 2: Convert to fraction form
    56,397.74/84,615.71 = 18,961.74/x
  3. Step 3: Cross multiply
    56,397.74x = 84,615.71 × 18,961.74
  4. Step 4: Simplify right side
    56,397.74x = 1,604,460,998.13
  5. Step 5: Solve for x
    x = 1,604,460,998.13/56,397.74
  6. Step 6: Final answer
    x = 28,449.03

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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.