Home / 12,215.57-16,859.30-7,739.74

Finding the Fourth Proportional to 12,215.57, 16,859.30 and 7,739.74

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Solution

The fourth proportional to 12,215.57, 16,859.30 and 7,739.74 is: 10,681.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.57 : 16,859.30 = 7,739.74 : x
  2. Step 2: Convert to fraction form
    12,215.57/16,859.30 = 7,739.74/x
  3. Step 3: Cross multiply
    12,215.57x = 16,859.30 × 7,739.74
  4. Step 4: Simplify right side
    12,215.57x = 130,486,611.67
  5. Step 5: Solve for x
    x = 130,486,611.67/12,215.57
  6. Step 6: Final answer
    x = 10,681.99

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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.