Home / 19,720.36-29,580.79-5,680.61

Finding the Fourth Proportional to 19,720.36, 29,580.79 and 5,680.61

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Solution

The fourth proportional to 19,720.36, 29,580.79 and 5,680.61 is: 8,520.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.36 : 29,580.79 = 5,680.61 : x
  2. Step 2: Convert to fraction form
    19,720.36/29,580.79 = 5,680.61/x
  3. Step 3: Cross multiply
    19,720.36x = 29,580.79 × 5,680.61
  4. Step 4: Simplify right side
    19,720.36x = 168,036,931.48
  5. Step 5: Solve for x
    x = 168,036,931.48/19,720.36
  6. Step 6: Final answer
    x = 8,520.99

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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.