Home / 13,698.08-18,902.40-7,728.68

Finding the Fourth Proportional to 13,698.08, 18,902.40 and 7,728.68

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Solution

The fourth proportional to 13,698.08, 18,902.40 and 7,728.68 is: 10,665.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,698.08 : 18,902.40 = 7,728.68 : x
  2. Step 2: Convert to fraction form
    13,698.08/18,902.40 = 7,728.68/x
  3. Step 3: Cross multiply
    13,698.08x = 18,902.40 × 7,728.68
  4. Step 4: Simplify right side
    13,698.08x = 146,090,600.83
  5. Step 5: Solve for x
    x = 146,090,600.83/13,698.08
  6. Step 6: Final answer
    x = 10,665.04

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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.