Home / 13,188.32-18,199.89-7,220.35

Finding the Fourth Proportional to 13,188.32, 18,199.89 and 7,220.35

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Solution

The fourth proportional to 13,188.32, 18,199.89 and 7,220.35 is: 9,964.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.32 : 18,199.89 = 7,220.35 : x
  2. Step 2: Convert to fraction form
    13,188.32/18,199.89 = 7,220.35/x
  3. Step 3: Cross multiply
    13,188.32x = 18,199.89 × 7,220.35
  4. Step 4: Simplify right side
    13,188.32x = 131,409,448.66
  5. Step 5: Solve for x
    x = 131,409,448.66/13,188.32
  6. Step 6: Final answer
    x = 9,964.08

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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.