Home / 19,781.29-29,669.72-4,990.21

Finding the Fourth Proportional to 19,781.29, 29,669.72 and 4,990.21

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Solution

The fourth proportional to 19,781.29, 29,669.72 and 4,990.21 is: 7,484.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.29 : 29,669.72 = 4,990.21 : x
  2. Step 2: Convert to fraction form
    19,781.29/29,669.72 = 4,990.21/x
  3. Step 3: Cross multiply
    19,781.29x = 29,669.72 × 4,990.21
  4. Step 4: Simplify right side
    19,781.29x = 148,058,133.44
  5. Step 5: Solve for x
    x = 148,058,133.44/19,781.29
  6. Step 6: Final answer
    x = 7,484.76

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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.