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Finding the Fourth Proportional to 19,010.20, 28,515.30 and 11,213.50

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Solution

The fourth proportional to 19,010.20, 28,515.30 and 11,213.50 is: 16,820.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.20 : 28,515.30 = 11,213.50 : x
  2. Step 2: Convert to fraction form
    19,010.20/28,515.30 = 11,213.50/x
  3. Step 3: Cross multiply
    19,010.20x = 28,515.30 × 11,213.50
  4. Step 4: Simplify right side
    19,010.20x = 319,756,316.55
  5. Step 5: Solve for x
    x = 319,756,316.55/19,010.20
  6. Step 6: Final answer
    x = 16,820.25

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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.