Home / 13,389.93-18,480.69-7,728.35

Finding the Fourth Proportional to 13,389.93, 18,480.69 and 7,728.35

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Solution

The fourth proportional to 13,389.93, 18,480.69 and 7,728.35 is: 10,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.93 : 18,480.69 = 7,728.35 : x
  2. Step 2: Convert to fraction form
    13,389.93/18,480.69 = 7,728.35/x
  3. Step 3: Cross multiply
    13,389.93x = 18,480.69 × 7,728.35
  4. Step 4: Simplify right side
    13,389.93x = 142,825,148.16
  5. Step 5: Solve for x
    x = 142,825,148.16/13,389.93
  6. Step 6: Final answer
    x = 10,666.61

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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.