Home / 18,513.28-25,548.30-10,129.78

Finding the Fourth Proportional to 18,513.28, 25,548.30 and 10,129.78

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Solution

The fourth proportional to 18,513.28, 25,548.30 and 10,129.78 is: 13,979.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.28 : 25,548.30 = 10,129.78 : x
  2. Step 2: Convert to fraction form
    18,513.28/25,548.30 = 10,129.78/x
  3. Step 3: Cross multiply
    18,513.28x = 25,548.30 × 10,129.78
  4. Step 4: Simplify right side
    18,513.28x = 258,798,658.37
  5. Step 5: Solve for x
    x = 258,798,658.37/18,513.28
  6. Step 6: Final answer
    x = 13,979.08

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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.