Home / 15,118.27-20,855.95-13,018.75

Finding the Fourth Proportional to 15,118.27, 20,855.95 and 13,018.75

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Solution

The fourth proportional to 15,118.27, 20,855.95 and 13,018.75 is: 17,959.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.27 : 20,855.95 = 13,018.75 : x
  2. Step 2: Convert to fraction form
    15,118.27/20,855.95 = 13,018.75/x
  3. Step 3: Cross multiply
    15,118.27x = 20,855.95 × 13,018.75
  4. Step 4: Simplify right side
    15,118.27x = 271,518,399.06
  5. Step 5: Solve for x
    x = 271,518,399.06/15,118.27
  6. Step 6: Final answer
    x = 17,959.62

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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.