Home / 19,643.58-29,384.37-12,612.78

Finding the Fourth Proportional to 19,643.58, 29,384.37 and 12,612.78

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Solution

The fourth proportional to 19,643.58, 29,384.37 and 12,612.78 is: 18,867.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,643.58 : 29,384.37 = 12,612.78 : x
  2. Step 2: Convert to fraction form
    19,643.58/29,384.37 = 12,612.78/x
  3. Step 3: Cross multiply
    19,643.58x = 29,384.37 × 12,612.78
  4. Step 4: Simplify right side
    19,643.58x = 370,618,594.25
  5. Step 5: Solve for x
    x = 370,618,594.25/19,643.58
  6. Step 6: Final answer
    x = 18,867.16

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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.