Home / 12,159.09-18,238.61-9,389.79

Finding the Fourth Proportional to 12,159.09, 18,238.61 and 9,389.79

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Solution

The fourth proportional to 12,159.09, 18,238.61 and 9,389.79 is: 14,084.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.09 : 18,238.61 = 9,389.79 : x
  2. Step 2: Convert to fraction form
    12,159.09/18,238.61 = 9,389.79/x
  3. Step 3: Cross multiply
    12,159.09x = 18,238.61 × 9,389.79
  4. Step 4: Simplify right side
    12,159.09x = 171,256,670.84
  5. Step 5: Solve for x
    x = 171,256,670.84/12,159.09
  6. Step 6: Final answer
    x = 14,084.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.