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Finding the Fourth Proportional to 18,686.59, 25,760.70 and 14,700.78

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Solution

The fourth proportional to 18,686.59, 25,760.70 and 14,700.78 is: 20,266.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,686.59 : 25,760.70 = 14,700.78 : x
  2. Step 2: Convert to fraction form
    18,686.59/25,760.70 = 14,700.78/x
  3. Step 3: Cross multiply
    18,686.59x = 25,760.70 × 14,700.78
  4. Step 4: Simplify right side
    18,686.59x = 378,702,383.35
  5. Step 5: Solve for x
    x = 378,702,383.35/18,686.59
  6. Step 6: Final answer
    x = 20,266.00

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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.