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Finding the Fourth Proportional to 19,172.96, 28,776.06 and 19,128.63

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Solution

The fourth proportional to 19,172.96, 28,776.06 and 19,128.63 is: 28,709.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,172.96 : 28,776.06 = 19,128.63 : x
  2. Step 2: Convert to fraction form
    19,172.96/28,776.06 = 19,128.63/x
  3. Step 3: Cross multiply
    19,172.96x = 28,776.06 × 19,128.63
  4. Step 4: Simplify right side
    19,172.96x = 550,446,508.95
  5. Step 5: Solve for x
    x = 550,446,508.95/19,172.96
  6. Step 6: Final answer
    x = 28,709.52

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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.