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Finding the Fourth Proportional to 38,504.52, 53,136.20 and 20,840.52

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Solution

The fourth proportional to 38,504.52, 53,136.20 and 20,840.52 is: 28,759.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,504.52 : 53,136.20 = 20,840.52 : x
  2. Step 2: Convert to fraction form
    38,504.52/53,136.20 = 20,840.52/x
  3. Step 3: Cross multiply
    38,504.52x = 53,136.20 × 20,840.52
  4. Step 4: Simplify right side
    38,504.52x = 1,107,386,038.82
  5. Step 5: Solve for x
    x = 1,107,386,038.82/38,504.52
  6. Step 6: Final answer
    x = 28,759.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.