Home / 12,156.16-16,786.56-9,166.88

Finding the Fourth Proportional to 12,156.16, 16,786.56 and 9,166.88

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Solution

The fourth proportional to 12,156.16, 16,786.56 and 9,166.88 is: 12,658.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,156.16 : 16,786.56 = 9,166.88 : x
  2. Step 2: Convert to fraction form
    12,156.16/16,786.56 = 9,166.88/x
  3. Step 3: Cross multiply
    12,156.16x = 16,786.56 × 9,166.88
  4. Step 4: Simplify right side
    12,156.16x = 153,880,381.13
  5. Step 5: Solve for x
    x = 153,880,381.13/12,156.16
  6. Step 6: Final answer
    x = 12,658.63

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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.