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Finding the Fourth Proportional to 20,562.88, 28,347.06 and 13,477

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Solution

The fourth proportional to 20,562.88, 28,347.06 and 13,477 is: 18,578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.88 : 28,347.06 = 13,477 : x
  2. Step 2: Convert to fraction form
    20,562.88/28,347.06 = 13,477/x
  3. Step 3: Cross multiply
    20,562.88x = 28,347.06 × 13,477
  4. Step 4: Simplify right side
    20,562.88x = 382,033,327.62
  5. Step 5: Solve for x
    x = 382,033,327.62/20,562.88
  6. Step 6: Final answer
    x = 18,578.79

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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.