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Finding the Fourth Proportional to 18,707.72, 28,053.32 and 7,012.74

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Solution

The fourth proportional to 18,707.72, 28,053.32 and 7,012.74 is: 10,516.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.72 : 28,053.32 = 7,012.74 : x
  2. Step 2: Convert to fraction form
    18,707.72/28,053.32 = 7,012.74/x
  3. Step 3: Cross multiply
    18,707.72x = 28,053.32 × 7,012.74
  4. Step 4: Simplify right side
    18,707.72x = 196,730,639.30
  5. Step 5: Solve for x
    x = 196,730,639.30/18,707.72
  6. Step 6: Final answer
    x = 10,516.01

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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.