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Finding the Fourth Proportional to 53,291.72, 79,890.54 and 21,728.19

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Solution

The fourth proportional to 53,291.72, 79,890.54 and 21,728.19 is: 32,573.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,291.72 : 79,890.54 = 21,728.19 : x
  2. Step 2: Convert to fraction form
    53,291.72/79,890.54 = 21,728.19/x
  3. Step 3: Cross multiply
    53,291.72x = 79,890.54 × 21,728.19
  4. Step 4: Simplify right side
    53,291.72x = 1,735,876,672.03
  5. Step 5: Solve for x
    x = 1,735,876,672.03/53,291.72
  6. Step 6: Final answer
    x = 32,573.10

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1.5x scale

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.