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Finding the Fourth Proportional to 18,891.03, 28,335.40 and 7,042.50

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Solution

The fourth proportional to 18,891.03, 28,335.40 and 7,042.50 is: 10,563.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.03 : 28,335.40 = 7,042.50 : x
  2. Step 2: Convert to fraction form
    18,891.03/28,335.40 = 7,042.50/x
  3. Step 3: Cross multiply
    18,891.03x = 28,335.40 × 7,042.50
  4. Step 4: Simplify right side
    18,891.03x = 199,552,054.50
  5. Step 5: Solve for x
    x = 199,552,054.50/18,891.03
  6. Step 6: Final answer
    x = 10,563.32

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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.