Home / 19,686.55-27,166.40-11,187.53

Finding the Fourth Proportional to 19,686.55, 27,166.40 and 11,187.53

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Solution

The fourth proportional to 19,686.55, 27,166.40 and 11,187.53 is: 15,438.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,686.55 : 27,166.40 = 11,187.53 : x
  2. Step 2: Convert to fraction form
    19,686.55/27,166.40 = 11,187.53/x
  3. Step 3: Cross multiply
    19,686.55x = 27,166.40 × 11,187.53
  4. Step 4: Simplify right side
    19,686.55x = 303,924,914.99
  5. Step 5: Solve for x
    x = 303,924,914.99/19,686.55
  6. Step 6: Final answer
    x = 15,438.20

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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.