Home / 15,788.19-21,787.37-8,618.25

Finding the Fourth Proportional to 15,788.19, 21,787.37 and 8,618.25

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Solution

The fourth proportional to 15,788.19, 21,787.37 and 8,618.25 is: 11,893.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.19 : 21,787.37 = 8,618.25 : x
  2. Step 2: Convert to fraction form
    15,788.19/21,787.37 = 8,618.25/x
  3. Step 3: Cross multiply
    15,788.19x = 21,787.37 × 8,618.25
  4. Step 4: Simplify right side
    15,788.19x = 187,768,998.36
  5. Step 5: Solve for x
    x = 187,768,998.36/15,788.19
  6. Step 6: Final answer
    x = 11,893.00

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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.