Home / 19,721.80-29,578.38-5,681.80

Finding the Fourth Proportional to 19,721.80, 29,578.38 and 5,681.80

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Solution

The fourth proportional to 19,721.80, 29,578.38 and 5,681.80 is: 8,521.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.80 : 29,578.38 = 5,681.80 : x
  2. Step 2: Convert to fraction form
    19,721.80/29,578.38 = 5,681.80/x
  3. Step 3: Cross multiply
    19,721.80x = 29,578.38 × 5,681.80
  4. Step 4: Simplify right side
    19,721.80x = 168,058,439.48
  5. Step 5: Solve for x
    x = 168,058,439.48/19,721.80
  6. Step 6: Final answer
    x = 8,521.46

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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.