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Finding the Fourth Proportional to 19,874.99, 27,398.59 and 13,888.08

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Solution

The fourth proportional to 19,874.99, 27,398.59 and 13,888.08 is: 19,145.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,874.99 : 27,398.59 = 13,888.08 : x
  2. Step 2: Convert to fraction form
    19,874.99/27,398.59 = 13,888.08/x
  3. Step 3: Cross multiply
    19,874.99x = 27,398.59 × 13,888.08
  4. Step 4: Simplify right side
    19,874.99x = 380,513,775.09
  5. Step 5: Solve for x
    x = 380,513,775.09/19,874.99
  6. Step 6: Final answer
    x = 19,145.35

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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.