Home / 15,819.64-21,830-8,745.50

Finding the Fourth Proportional to 15,819.64, 21,830 and 8,745.50

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Solution

The fourth proportional to 15,819.64, 21,830 and 8,745.50 is: 12,068.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.64 : 21,830 = 8,745.50 : x
  2. Step 2: Convert to fraction form
    15,819.64/21,830 = 8,745.50/x
  3. Step 3: Cross multiply
    15,819.64x = 21,830 × 8,745.50
  4. Step 4: Simplify right side
    15,819.64x = 190,914,265
  5. Step 5: Solve for x
    x = 190,914,265/15,819.64
  6. Step 6: Final answer
    x = 12,068.18

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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.