Home / 13,621.64-18,790.80-9,146.95

Finding the Fourth Proportional to 13,621.64, 18,790.80 and 9,146.95

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Solution

The fourth proportional to 13,621.64, 18,790.80 and 9,146.95 is: 12,618.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.64 : 18,790.80 = 9,146.95 : x
  2. Step 2: Convert to fraction form
    13,621.64/18,790.80 = 9,146.95/x
  3. Step 3: Cross multiply
    13,621.64x = 18,790.80 × 9,146.95
  4. Step 4: Simplify right side
    13,621.64x = 171,878,508.06
  5. Step 5: Solve for x
    x = 171,878,508.06/13,621.64
  6. Step 6: Final answer
    x = 12,618.05

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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.