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Finding the Fourth Proportional to 56,347.88, 84,564.67 and 20,842.79

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Solution

The fourth proportional to 56,347.88, 84,564.67 and 20,842.79 is: 31,280.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,347.88 : 84,564.67 = 20,842.79 : x
  2. Step 2: Convert to fraction form
    56,347.88/84,564.67 = 20,842.79/x
  3. Step 3: Cross multiply
    56,347.88x = 84,564.67 × 20,842.79
  4. Step 4: Simplify right side
    56,347.88x = 1,762,563,658.23
  5. Step 5: Solve for x
    x = 1,762,563,658.23/56,347.88
  6. Step 6: Final answer
    x = 31,280.03

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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.