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Finding the Fourth Proportional to 12,993.40, 19,490.10 and 4,674.70

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Solution

The fourth proportional to 12,993.40, 19,490.10 and 4,674.70 is: 7,012.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,993.40 : 19,490.10 = 4,674.70 : x
  2. Step 2: Convert to fraction form
    12,993.40/19,490.10 = 4,674.70/x
  3. Step 3: Cross multiply
    12,993.40x = 19,490.10 × 4,674.70
  4. Step 4: Simplify right side
    12,993.40x = 91,110,370.47
  5. Step 5: Solve for x
    x = 91,110,370.47/12,993.40
  6. Step 6: Final answer
    x = 7,012.05

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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.