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Finding the Fourth Proportional to 12,858.91, 19,256.91 and 11,612.32

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Solution

The fourth proportional to 12,858.91, 19,256.91 and 11,612.32 is: 17,390.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,858.91 : 19,256.91 = 11,612.32 : x
  2. Step 2: Convert to fraction form
    12,858.91/19,256.91 = 11,612.32/x
  3. Step 3: Cross multiply
    12,858.91x = 19,256.91 × 11,612.32
  4. Step 4: Simplify right side
    12,858.91x = 223,617,401.13
  5. Step 5: Solve for x
    x = 223,617,401.13/12,858.91
  6. Step 6: Final answer
    x = 17,390.07

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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.