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Finding the Fourth Proportional to 18,838.70, 28,209.45 and 14,950.70

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Solution

The fourth proportional to 18,838.70, 28,209.45 and 14,950.70 is: 22,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.70 : 28,209.45 = 14,950.70 : x
  2. Step 2: Convert to fraction form
    18,838.70/28,209.45 = 14,950.70/x
  3. Step 3: Cross multiply
    18,838.70x = 28,209.45 × 14,950.70
  4. Step 4: Simplify right side
    18,838.70x = 421,751,024.12
  5. Step 5: Solve for x
    x = 421,751,024.12/18,838.70
  6. Step 6: Final answer
    x = 22,387.48

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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.