Home / 19,664.90-29,439.42-12,989.16

Finding the Fourth Proportional to 19,664.90, 29,439.42 and 12,989.16

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Solution

The fourth proportional to 19,664.90, 29,439.42 and 12,989.16 is: 19,445.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,664.90 : 29,439.42 = 12,989.16 : x
  2. Step 2: Convert to fraction form
    19,664.90/29,439.42 = 12,989.16/x
  3. Step 3: Cross multiply
    19,664.90x = 29,439.42 × 12,989.16
  4. Step 4: Simplify right side
    19,664.90x = 382,393,336.69
  5. Step 5: Solve for x
    x = 382,393,336.69/19,664.90
  6. Step 6: Final answer
    x = 19,445.48

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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.