Home / 18,728.56-28,095.88-7,042.72

Finding the Fourth Proportional to 18,728.56, 28,095.88 and 7,042.72

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Solution

The fourth proportional to 18,728.56, 28,095.88 and 7,042.72 is: 10,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,728.56 : 28,095.88 = 7,042.72 : x
  2. Step 2: Convert to fraction form
    18,728.56/28,095.88 = 7,042.72/x
  3. Step 3: Cross multiply
    18,728.56x = 28,095.88 × 7,042.72
  4. Step 4: Simplify right side
    18,728.56x = 197,871,415.99
  5. Step 5: Solve for x
    x = 197,871,415.99/18,728.56
  6. Step 6: Final answer
    x = 10,565.22

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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.