Home / 7,239.40-9,990.66-4,445.80

Finding the Fourth Proportional to 7,239.40, 9,990.66 and 4,445.80

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Solution

The fourth proportional to 7,239.40, 9,990.66 and 4,445.80 is: 6,135.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.40 : 9,990.66 = 4,445.80 : x
  2. Step 2: Convert to fraction form
    7,239.40/9,990.66 = 4,445.80/x
  3. Step 3: Cross multiply
    7,239.40x = 9,990.66 × 4,445.80
  4. Step 4: Simplify right side
    7,239.40x = 44,416,476.23
  5. Step 5: Solve for x
    x = 44,416,476.23/7,239.40
  6. Step 6: Final answer
    x = 6,135.38

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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.