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Finding the Fourth Proportional to 18,699.76, 28,054.52 and 7,013.20

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Solution

The fourth proportional to 18,699.76, 28,054.52 and 7,013.20 is: 10,521.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.76 : 28,054.52 = 7,013.20 : x
  2. Step 2: Convert to fraction form
    18,699.76/28,054.52 = 7,013.20/x
  3. Step 3: Cross multiply
    18,699.76x = 28,054.52 × 7,013.20
  4. Step 4: Simplify right side
    18,699.76x = 196,751,959.66
  5. Step 5: Solve for x
    x = 196,751,959.66/18,699.76
  6. Step 6: Final answer
    x = 10,521.63

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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.