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Finding the Fourth Proportional to 18,703.71, 28,042.20 and 7,006.50

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Solution

The fourth proportional to 18,703.71, 28,042.20 and 7,006.50 is: 10,504.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.71 : 28,042.20 = 7,006.50 : x
  2. Step 2: Convert to fraction form
    18,703.71/28,042.20 = 7,006.50/x
  3. Step 3: Cross multiply
    18,703.71x = 28,042.20 × 7,006.50
  4. Step 4: Simplify right side
    18,703.71x = 196,477,674.30
  5. Step 5: Solve for x
    x = 196,477,674.30/18,703.71
  6. Step 6: Final answer
    x = 10,504.74

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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.