Home / 6,421.20-9,630.98-2,038.70

Finding the Fourth Proportional to 6,421.20, 9,630.98 and 2,038.70

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Solution

The fourth proportional to 6,421.20, 9,630.98 and 2,038.70 is: 3,057.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421.20 : 9,630.98 = 2,038.70 : x
  2. Step 2: Convert to fraction form
    6,421.20/9,630.98 = 2,038.70/x
  3. Step 3: Cross multiply
    6,421.20x = 9,630.98 × 2,038.70
  4. Step 4: Simplify right side
    6,421.20x = 19,634,678.93
  5. Step 5: Solve for x
    x = 19,634,678.93/6,421.20
  6. Step 6: Final answer
    x = 3,057.79

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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.