Home / 6,438.20-9,657.30-4,978.40

Finding the Fourth Proportional to 6,438.20, 9,657.30 and 4,978.40

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Solution

The fourth proportional to 6,438.20, 9,657.30 and 4,978.40 is: 7,467.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.20 : 9,657.30 = 4,978.40 : x
  2. Step 2: Convert to fraction form
    6,438.20/9,657.30 = 4,978.40/x
  3. Step 3: Cross multiply
    6,438.20x = 9,657.30 × 4,978.40
  4. Step 4: Simplify right side
    6,438.20x = 48,077,902.32
  5. Step 5: Solve for x
    x = 48,077,902.32/6,438.20
  6. Step 6: Final answer
    x = 7,467.60

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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.