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Finding the Fourth Proportional to 19,637.80, 29,424.30 and 18,471.40

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Solution

The fourth proportional to 19,637.80, 29,424.30 and 18,471.40 is: 27,676.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,637.80 : 29,424.30 = 18,471.40 : x
  2. Step 2: Convert to fraction form
    19,637.80/29,424.30 = 18,471.40/x
  3. Step 3: Cross multiply
    19,637.80x = 29,424.30 × 18,471.40
  4. Step 4: Simplify right side
    19,637.80x = 543,508,015.02
  5. Step 5: Solve for x
    x = 543,508,015.02/19,637.80
  6. Step 6: Final answer
    x = 27,676.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.