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Finding the Fourth Proportional to 18,709.16, 28,055.47 and 7,014.18

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Solution

The fourth proportional to 18,709.16, 28,055.47 and 7,014.18 is: 10,518.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.16 : 28,055.47 = 7,014.18 : x
  2. Step 2: Convert to fraction form
    18,709.16/28,055.47 = 7,014.18/x
  3. Step 3: Cross multiply
    18,709.16x = 28,055.47 × 7,014.18
  4. Step 4: Simplify right side
    18,709.16x = 196,786,116.56
  5. Step 5: Solve for x
    x = 196,786,116.56/18,709.16
  6. Step 6: Final answer
    x = 10,518.17

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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.