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Finding the Fourth Proportional to 18,802.70, 28,214.85 and 7,124.30

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Solution

The fourth proportional to 18,802.70, 28,214.85 and 7,124.30 is: 10,690.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.70 : 28,214.85 = 7,124.30 : x
  2. Step 2: Convert to fraction form
    18,802.70/28,214.85 = 7,124.30/x
  3. Step 3: Cross multiply
    18,802.70x = 28,214.85 × 7,124.30
  4. Step 4: Simplify right side
    18,802.70x = 201,011,055.86
  5. Step 5: Solve for x
    x = 201,011,055.86/18,802.70
  6. Step 6: Final answer
    x = 10,690.54

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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.