Home / 13,718.06-18,931.30-8,415.80

Finding the Fourth Proportional to 13,718.06, 18,931.30 and 8,415.80

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Solution

The fourth proportional to 13,718.06, 18,931.30 and 8,415.80 is: 11,614.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,718.06 : 18,931.30 = 8,415.80 : x
  2. Step 2: Convert to fraction form
    13,718.06/18,931.30 = 8,415.80/x
  3. Step 3: Cross multiply
    13,718.06x = 18,931.30 × 8,415.80
  4. Step 4: Simplify right side
    13,718.06x = 159,322,034.54
  5. Step 5: Solve for x
    x = 159,322,034.54/13,718.06
  6. Step 6: Final answer
    x = 11,614.04

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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.