Home / 19,721.71-29,584.50-9,720.46

Finding the Fourth Proportional to 19,721.71, 29,584.50 and 9,720.46

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Solution

The fourth proportional to 19,721.71, 29,584.50 and 9,720.46 is: 14,581.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.71 : 29,584.50 = 9,720.46 : x
  2. Step 2: Convert to fraction form
    19,721.71/29,584.50 = 9,720.46/x
  3. Step 3: Cross multiply
    19,721.71x = 29,584.50 × 9,720.46
  4. Step 4: Simplify right side
    19,721.71x = 287,574,948.87
  5. Step 5: Solve for x
    x = 287,574,948.87/19,721.71
  6. Step 6: Final answer
    x = 14,581.64

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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.