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Finding the Fourth Proportional to 28,647.88, 42,909.53 and 17,520.91

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Solution

The fourth proportional to 28,647.88, 42,909.53 and 17,520.91 is: 26,243.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,647.88 : 42,909.53 = 17,520.91 : x
  2. Step 2: Convert to fraction form
    28,647.88/42,909.53 = 17,520.91/x
  3. Step 3: Cross multiply
    28,647.88x = 42,909.53 × 17,520.91
  4. Step 4: Simplify right side
    28,647.88x = 751,813,818.39
  5. Step 5: Solve for x
    x = 751,813,818.39/28,647.88
  6. Step 6: Final answer
    x = 26,243.26

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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.