Home / 19,686.10-27,166.86-11,728.45

Finding the Fourth Proportional to 19,686.10, 27,166.86 and 11,728.45

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Solution

The fourth proportional to 19,686.10, 27,166.86 and 11,728.45 is: 16,185.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,686.10 : 27,166.86 = 11,728.45 : x
  2. Step 2: Convert to fraction form
    19,686.10/27,166.86 = 11,728.45/x
  3. Step 3: Cross multiply
    19,686.10x = 27,166.86 × 11,728.45
  4. Step 4: Simplify right side
    19,686.10x = 318,625,159.17
  5. Step 5: Solve for x
    x = 318,625,159.17/19,686.10
  6. Step 6: Final answer
    x = 16,185.29

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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.