Home / 19,120.17-28,663.20-7,430.70

Finding the Fourth Proportional to 19,120.17, 28,663.20 and 7,430.70

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Solution

The fourth proportional to 19,120.17, 28,663.20 and 7,430.70 is: 11,139.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.17 : 28,663.20 = 7,430.70 : x
  2. Step 2: Convert to fraction form
    19,120.17/28,663.20 = 7,430.70/x
  3. Step 3: Cross multiply
    19,120.17x = 28,663.20 × 7,430.70
  4. Step 4: Simplify right side
    19,120.17x = 212,987,640.24
  5. Step 5: Solve for x
    x = 212,987,640.24/19,120.17
  6. Step 6: Final answer
    x = 11,139.42

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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.