Home / 13,286.66-18,337.04-7,621.72

Finding the Fourth Proportional to 13,286.66, 18,337.04 and 7,621.72

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Solution

The fourth proportional to 13,286.66, 18,337.04 and 7,621.72 is: 10,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,286.66 : 18,337.04 = 7,621.72 : x
  2. Step 2: Convert to fraction form
    13,286.66/18,337.04 = 7,621.72/x
  3. Step 3: Cross multiply
    13,286.66x = 18,337.04 × 7,621.72
  4. Step 4: Simplify right side
    13,286.66x = 139,759,784.51
  5. Step 5: Solve for x
    x = 139,759,784.51/13,286.66
  6. Step 6: Final answer
    x = 10,518.80

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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.