Home / 12,674.04-18,990.54-7,728.72

Finding the Fourth Proportional to 12,674.04, 18,990.54 and 7,728.72

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Solution

The fourth proportional to 12,674.04, 18,990.54 and 7,728.72 is: 11,580.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,674.04 : 18,990.54 = 7,728.72 : x
  2. Step 2: Convert to fraction form
    12,674.04/18,990.54 = 7,728.72/x
  3. Step 3: Cross multiply
    12,674.04x = 18,990.54 × 7,728.72
  4. Step 4: Simplify right side
    12,674.04x = 146,772,566.31
  5. Step 5: Solve for x
    x = 146,772,566.31/12,674.04
  6. Step 6: Final answer
    x = 11,580.57

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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.