Home / 13,639.04-18,817.35-11,116.81

Finding the Fourth Proportional to 13,639.04, 18,817.35 and 11,116.81

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Solution

The fourth proportional to 13,639.04, 18,817.35 and 11,116.81 is: 15,337.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.04 : 18,817.35 = 11,116.81 : x
  2. Step 2: Convert to fraction form
    13,639.04/18,817.35 = 11,116.81/x
  3. Step 3: Cross multiply
    13,639.04x = 18,817.35 × 11,116.81
  4. Step 4: Simplify right side
    13,639.04x = 209,188,904.65
  5. Step 5: Solve for x
    x = 209,188,904.65/13,639.04
  6. Step 6: Final answer
    x = 15,337.51

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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.