Home / 13,251.10-18,302.75-9,908.78

Finding the Fourth Proportional to 13,251.10, 18,302.75 and 9,908.78

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Solution

The fourth proportional to 13,251.10, 18,302.75 and 9,908.78 is: 13,686.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.10 : 18,302.75 = 9,908.78 : x
  2. Step 2: Convert to fraction form
    13,251.10/18,302.75 = 9,908.78/x
  3. Step 3: Cross multiply
    13,251.10x = 18,302.75 × 9,908.78
  4. Step 4: Simplify right side
    13,251.10x = 181,357,919.36
  5. Step 5: Solve for x
    x = 181,357,919.36/13,251.10
  6. Step 6: Final answer
    x = 13,686.25

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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.