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Finding the Fourth Proportional to 19,700.54, 27,178.17 and 12,977.54

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Solution

The fourth proportional to 19,700.54, 27,178.17 and 12,977.54 is: 17,903.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,700.54 : 27,178.17 = 12,977.54 : x
  2. Step 2: Convert to fraction form
    19,700.54/27,178.17 = 12,977.54/x
  3. Step 3: Cross multiply
    19,700.54x = 27,178.17 × 12,977.54
  4. Step 4: Simplify right side
    19,700.54x = 352,705,788.30
  5. Step 5: Solve for x
    x = 352,705,788.30/19,700.54
  6. Step 6: Final answer
    x = 17,903.36

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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.