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Finding the Fourth Proportional to 14,138.40, 19,837.50 and 14,138.40

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Solution

The fourth proportional to 14,138.40, 19,837.50 and 14,138.40 is: 19,837.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.40 : 19,837.50 = 14,138.40 : x
  2. Step 2: Convert to fraction form
    14,138.40/19,837.50 = 14,138.40/x
  3. Step 3: Cross multiply
    14,138.40x = 19,837.50 × 14,138.40
  4. Step 4: Simplify right side
    14,138.40x = 280,470,510
  5. Step 5: Solve for x
    x = 280,470,510/14,138.40
  6. Step 6: Final answer
    x = 19,837.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.