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Finding the Fourth Proportional to 19,219.77, 28,828.62 and 7,379.22

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Solution

The fourth proportional to 19,219.77, 28,828.62 and 7,379.22 is: 11,068.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.77 : 28,828.62 = 7,379.22 : x
  2. Step 2: Convert to fraction form
    19,219.77/28,828.62 = 7,379.22/x
  3. Step 3: Cross multiply
    19,219.77x = 28,828.62 × 7,379.22
  4. Step 4: Simplify right side
    19,219.77x = 212,732,729.28
  5. Step 5: Solve for x
    x = 212,732,729.28/19,219.77
  6. Step 6: Final answer
    x = 11,068.43

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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.