Home / 7,400.35-11,047.80-7,140.85

Finding the Fourth Proportional to 7,400.35, 11,047.80 and 7,140.85

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Solution

The fourth proportional to 7,400.35, 11,047.80 and 7,140.85 is: 10,660.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,400.35 : 11,047.80 = 7,140.85 : x
  2. Step 2: Convert to fraction form
    7,400.35/11,047.80 = 7,140.85/x
  3. Step 3: Cross multiply
    7,400.35x = 11,047.80 × 7,140.85
  4. Step 4: Simplify right side
    7,400.35x = 78,890,682.63
  5. Step 5: Solve for x
    x = 78,890,682.63/7,400.35
  6. Step 6: Final answer
    x = 10,660.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.