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Finding the Fourth Proportional to 7,339.40, 11,030.70 and 7,209.80

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Solution

The fourth proportional to 7,339.40, 11,030.70 and 7,209.80 is: 10,835.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,339.40 : 11,030.70 = 7,209.80 : x
  2. Step 2: Convert to fraction form
    7,339.40/11,030.70 = 7,209.80/x
  3. Step 3: Cross multiply
    7,339.40x = 11,030.70 × 7,209.80
  4. Step 4: Simplify right side
    7,339.40x = 79,529,140.86
  5. Step 5: Solve for x
    x = 79,529,140.86/7,339.40
  6. Step 6: Final answer
    x = 10,835.92

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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.