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Finding the Fourth Proportional to 19,348.20, 26,687.88 and 15,363

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Solution

The fourth proportional to 19,348.20, 26,687.88 and 15,363 is: 21,190.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,348.20 : 26,687.88 = 15,363 : x
  2. Step 2: Convert to fraction form
    19,348.20/26,687.88 = 15,363/x
  3. Step 3: Cross multiply
    19,348.20x = 26,687.88 × 15,363
  4. Step 4: Simplify right side
    19,348.20x = 410,005,900.44
  5. Step 5: Solve for x
    x = 410,005,900.44/19,348.20
  6. Step 6: Final answer
    x = 21,190.91

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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.