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Finding the Fourth Proportional to 19,471.84, 26,863.92 and 13,508.80

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Solution

The fourth proportional to 19,471.84, 26,863.92 and 13,508.80 is: 18,637.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,471.84 : 26,863.92 = 13,508.80 : x
  2. Step 2: Convert to fraction form
    19,471.84/26,863.92 = 13,508.80/x
  3. Step 3: Cross multiply
    19,471.84x = 26,863.92 × 13,508.80
  4. Step 4: Simplify right side
    19,471.84x = 362,899,322.50
  5. Step 5: Solve for x
    x = 362,899,322.50/19,471.84
  6. Step 6: Final answer
    x = 18,637.14

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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.