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Finding the Fourth Proportional to 56,407.61, 84,522.39 and 20,819.94

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Solution

The fourth proportional to 56,407.61, 84,522.39 and 20,819.94 is: 31,197.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,407.61 : 84,522.39 = 20,819.94 : x
  2. Step 2: Convert to fraction form
    56,407.61/84,522.39 = 20,819.94/x
  3. Step 3: Cross multiply
    56,407.61x = 84,522.39 × 20,819.94
  4. Step 4: Simplify right side
    56,407.61x = 1,759,751,088.46
  5. Step 5: Solve for x
    x = 1,759,751,088.46/56,407.61
  6. Step 6: Final answer
    x = 31,197.05

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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.