Home / 30,126.62-45,140.52-21,345.86

Finding the Fourth Proportional to 30,126.62, 45,140.52 and 21,345.86

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Solution

The fourth proportional to 30,126.62, 45,140.52 and 21,345.86 is: 31,983.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,126.62 : 45,140.52 = 21,345.86 : x
  2. Step 2: Convert to fraction form
    30,126.62/45,140.52 = 21,345.86/x
  3. Step 3: Cross multiply
    30,126.62x = 45,140.52 × 21,345.86
  4. Step 4: Simplify right side
    30,126.62x = 963,563,220.25
  5. Step 5: Solve for x
    x = 963,563,220.25/30,126.62
  6. Step 6: Final answer
    x = 31,983.78

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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.