Home / 18,728.04-28,088.82-7,039.20

Finding the Fourth Proportional to 18,728.04, 28,088.82 and 7,039.20

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Solution

The fourth proportional to 18,728.04, 28,088.82 and 7,039.20 is: 10,557.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.04 : 28,088.82 = 7,039.20 : x
  2. Step 2: Convert to fraction form
    18,728.04/28,088.82 = 7,039.20/x
  3. Step 3: Cross multiply
    18,728.04x = 28,088.82 × 7,039.20
  4. Step 4: Simplify right side
    18,728.04x = 197,722,821.74
  5. Step 5: Solve for x
    x = 197,722,821.74/18,728.04
  6. Step 6: Final answer
    x = 10,557.58

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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.