Home / 15,777.36-21,771.07-8,703.79

Finding the Fourth Proportional to 15,777.36, 21,771.07 and 8,703.79

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Solution

The fourth proportional to 15,777.36, 21,771.07 and 8,703.79 is: 12,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.36 : 21,771.07 = 8,703.79 : x
  2. Step 2: Convert to fraction form
    15,777.36/21,771.07 = 8,703.79/x
  3. Step 3: Cross multiply
    15,777.36x = 21,771.07 × 8,703.79
  4. Step 4: Simplify right side
    15,777.36x = 189,490,821.36
  5. Step 5: Solve for x
    x = 189,490,821.36/15,777.36
  6. Step 6: Final answer
    x = 12,010.30

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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.