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Finding the Fourth Proportional to 20,589.99, 30,919.16 and 12,848.01

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Solution

The fourth proportional to 20,589.99, 30,919.16 and 12,848.01 is: 19,293.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.99 : 30,919.16 = 12,848.01 : x
  2. Step 2: Convert to fraction form
    20,589.99/30,919.16 = 12,848.01/x
  3. Step 3: Cross multiply
    20,589.99x = 30,919.16 × 12,848.01
  4. Step 4: Simplify right side
    20,589.99x = 397,249,612.63
  5. Step 5: Solve for x
    x = 397,249,612.63/20,589.99
  6. Step 6: Final answer
    x = 19,293.34

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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.