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Finding the Fourth Proportional to 19,643.94, 27,101.94 and 11,145.12

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Solution

The fourth proportional to 19,643.94, 27,101.94 and 11,145.12 is: 15,376.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.94 : 27,101.94 = 11,145.12 : x
  2. Step 2: Convert to fraction form
    19,643.94/27,101.94 = 11,145.12/x
  3. Step 3: Cross multiply
    19,643.94x = 27,101.94 × 11,145.12
  4. Step 4: Simplify right side
    19,643.94x = 302,054,373.53
  5. Step 5: Solve for x
    x = 302,054,373.53/19,643.94
  6. Step 6: Final answer
    x = 15,376.47

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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.