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Finding the Fourth Proportional to 18,995.95, 28,495.13 and 7,309.16

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Solution

The fourth proportional to 18,995.95, 28,495.13 and 7,309.16 is: 10,964.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.95 : 28,495.13 = 7,309.16 : x
  2. Step 2: Convert to fraction form
    18,995.95/28,495.13 = 7,309.16/x
  3. Step 3: Cross multiply
    18,995.95x = 28,495.13 × 7,309.16
  4. Step 4: Simplify right side
    18,995.95x = 208,275,464.39
  5. Step 5: Solve for x
    x = 208,275,464.39/18,995.95
  6. Step 6: Final answer
    x = 10,964.20

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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.