Home / 16,821.40-25,228.84-5,135.80

Finding the Fourth Proportional to 16,821.40, 25,228.84 and 5,135.80

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Solution

The fourth proportional to 16,821.40, 25,228.84 and 5,135.80 is: 7,702.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,821.40 : 25,228.84 = 5,135.80 : x
  2. Step 2: Convert to fraction form
    16,821.40/25,228.84 = 5,135.80/x
  3. Step 3: Cross multiply
    16,821.40x = 25,228.84 × 5,135.80
  4. Step 4: Simplify right side
    16,821.40x = 129,570,276.47
  5. Step 5: Solve for x
    x = 129,570,276.47/16,821.40
  6. Step 6: Final answer
    x = 7,702.70

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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.