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Finding the Fourth Proportional to 39,710.59, 54,797.04 and 21,805.20

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Solution

The fourth proportional to 39,710.59, 54,797.04 and 21,805.20 is: 30,089.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,710.59 : 54,797.04 = 21,805.20 : x
  2. Step 2: Convert to fraction form
    39,710.59/54,797.04 = 21,805.20/x
  3. Step 3: Cross multiply
    39,710.59x = 54,797.04 × 21,805.20
  4. Step 4: Simplify right side
    39,710.59x = 1,194,860,416.61
  5. Step 5: Solve for x
    x = 1,194,860,416.61/39,710.59
  6. Step 6: Final answer
    x = 30,089.22

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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.