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Finding the Fourth Proportional to 56,658.80, 84,984.60 and 19,218.80

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Solution

The fourth proportional to 56,658.80, 84,984.60 and 19,218.80 is: 28,826.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,658.80 : 84,984.60 = 19,218.80 : x
  2. Step 2: Convert to fraction form
    56,658.80/84,984.60 = 19,218.80/x
  3. Step 3: Cross multiply
    56,658.80x = 84,984.60 × 19,218.80
  4. Step 4: Simplify right side
    56,658.80x = 1,633,302,030.48
  5. Step 5: Solve for x
    x = 1,633,302,030.48/56,658.80
  6. Step 6: Final answer
    x = 28,826.98

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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.