Home / 13,879.89-19,157.04-9,639.81

Finding the Fourth Proportional to 13,879.89, 19,157.04 and 9,639.81

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Solution

The fourth proportional to 13,879.89, 19,157.04 and 9,639.81 is: 13,304.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.89 : 19,157.04 = 9,639.81 : x
  2. Step 2: Convert to fraction form
    13,879.89/19,157.04 = 9,639.81/x
  3. Step 3: Cross multiply
    13,879.89x = 19,157.04 × 9,639.81
  4. Step 4: Simplify right side
    13,879.89x = 184,670,225.76
  5. Step 5: Solve for x
    x = 184,670,225.76/13,879.89
  6. Step 6: Final answer
    x = 13,304.88

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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.