Home / 12,485.80-17,230.98-8,511.40

Finding the Fourth Proportional to 12,485.80, 17,230.98 and 8,511.40

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Solution

The fourth proportional to 12,485.80, 17,230.98 and 8,511.40 is: 11,746.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.80 : 17,230.98 = 8,511.40 : x
  2. Step 2: Convert to fraction form
    12,485.80/17,230.98 = 8,511.40/x
  3. Step 3: Cross multiply
    12,485.80x = 17,230.98 × 8,511.40
  4. Step 4: Simplify right side
    12,485.80x = 146,659,763.17
  5. Step 5: Solve for x
    x = 146,659,763.17/12,485.80
  6. Step 6: Final answer
    x = 11,746.12

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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.