Home / 7,511.40-11,271.15-3,129.30

Finding the Fourth Proportional to 7,511.40, 11,271.15 and 3,129.30

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Solution

The fourth proportional to 7,511.40, 11,271.15 and 3,129.30 is: 4,695.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,511.40 : 11,271.15 = 3,129.30 : x
  2. Step 2: Convert to fraction form
    7,511.40/11,271.15 = 3,129.30/x
  3. Step 3: Cross multiply
    7,511.40x = 11,271.15 × 3,129.30
  4. Step 4: Simplify right side
    7,511.40x = 35,270,809.70
  5. Step 5: Solve for x
    x = 35,270,809.70/7,511.40
  6. Step 6: Final answer
    x = 4,695.64

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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.