Home / 19,781.37-29,669.77-4,990.42

Finding the Fourth Proportional to 19,781.37, 29,669.77 and 4,990.42

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Solution

The fourth proportional to 19,781.37, 29,669.77 and 4,990.42 is: 7,485.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,781.37 : 29,669.77 = 4,990.42 : x
  2. Step 2: Convert to fraction form
    19,781.37/29,669.77 = 4,990.42/x
  3. Step 3: Cross multiply
    19,781.37x = 29,669.77 × 4,990.42
  4. Step 4: Simplify right side
    19,781.37x = 148,064,613.60
  5. Step 5: Solve for x
    x = 148,064,613.60/19,781.37
  6. Step 6: Final answer
    x = 7,485.05

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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.