Home / 12,857.20-19,284.99-4,098.40

Finding the Fourth Proportional to 12,857.20, 19,284.99 and 4,098.40

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Solution

The fourth proportional to 12,857.20, 19,284.99 and 4,098.40 is: 6,147.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.20 : 19,284.99 = 4,098.40 : x
  2. Step 2: Convert to fraction form
    12,857.20/19,284.99 = 4,098.40/x
  3. Step 3: Cross multiply
    12,857.20x = 19,284.99 × 4,098.40
  4. Step 4: Simplify right side
    12,857.20x = 79,037,603.02
  5. Step 5: Solve for x
    x = 79,037,603.02/12,857.20
  6. Step 6: Final answer
    x = 6,147.34

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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.