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Finding the Fourth Proportional to 15,114.75, 20,870.94 and 12,609.99

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Solution

The fourth proportional to 15,114.75, 20,870.94 and 12,609.99 is: 17,412.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,114.75 : 20,870.94 = 12,609.99 : x
  2. Step 2: Convert to fraction form
    15,114.75/20,870.94 = 12,609.99/x
  3. Step 3: Cross multiply
    15,114.75x = 20,870.94 × 12,609.99
  4. Step 4: Simplify right side
    15,114.75x = 263,182,418.07
  5. Step 5: Solve for x
    x = 263,182,418.07/15,114.75
  6. Step 6: Final answer
    x = 17,412.29

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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.