Home / 21,763.06-30,022.77-15,781.61

Finding the Fourth Proportional to 21,763.06, 30,022.77 and 15,781.61

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Solution

The fourth proportional to 21,763.06, 30,022.77 and 15,781.61 is: 21,771.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,763.06 : 30,022.77 = 15,781.61 : x
  2. Step 2: Convert to fraction form
    21,763.06/30,022.77 = 15,781.61/x
  3. Step 3: Cross multiply
    21,763.06x = 30,022.77 × 15,781.61
  4. Step 4: Simplify right side
    21,763.06x = 473,807,647.26
  5. Step 5: Solve for x
    x = 473,807,647.26/21,763.06
  6. Step 6: Final answer
    x = 21,771.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.