Home / 15,782.09-21,778.20-8,708.63

Finding the Fourth Proportional to 15,782.09, 21,778.20 and 8,708.63

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Solution

The fourth proportional to 15,782.09, 21,778.20 and 8,708.63 is: 12,017.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.09 : 21,778.20 = 8,708.63 : x
  2. Step 2: Convert to fraction form
    15,782.09/21,778.20 = 8,708.63/x
  3. Step 3: Cross multiply
    15,782.09x = 21,778.20 × 8,708.63
  4. Step 4: Simplify right side
    15,782.09x = 189,658,176.98
  5. Step 5: Solve for x
    x = 189,658,176.98/15,782.09
  6. Step 6: Final answer
    x = 12,017.31

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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.