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Finding the Fourth Proportional to 15,819, 21,830.06 and 8,745.08

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Solution

The fourth proportional to 15,819, 21,830.06 and 8,745.08 is: 12,068.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819 : 21,830.06 = 8,745.08 : x
  2. Step 2: Convert to fraction form
    15,819/21,830.06 = 8,745.08/x
  3. Step 3: Cross multiply
    15,819x = 21,830.06 × 8,745.08
  4. Step 4: Simplify right side
    15,819x = 190,905,621.10
  5. Step 5: Solve for x
    x = 190,905,621.10/15,819
  6. Step 6: Final answer
    x = 12,068.12

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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.