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Finding the Fourth Proportional to 18,813.99, 25,964.47 and 10,430.49

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Solution

The fourth proportional to 18,813.99, 25,964.47 and 10,430.49 is: 14,394.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.99 : 25,964.47 = 10,430.49 : x
  2. Step 2: Convert to fraction form
    18,813.99/25,964.47 = 10,430.49/x
  3. Step 3: Cross multiply
    18,813.99x = 25,964.47 × 10,430.49
  4. Step 4: Simplify right side
    18,813.99x = 270,822,014.87
  5. Step 5: Solve for x
    x = 270,822,014.87/18,813.99
  6. Step 6: Final answer
    x = 14,394.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.