Home / 8,430.69-12,648.09-2,808.35

Finding the Fourth Proportional to 8,430.69, 12,648.09 and 2,808.35

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Solution

The fourth proportional to 8,430.69, 12,648.09 and 2,808.35 is: 4,213.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,430.69 : 12,648.09 = 2,808.35 : x
  2. Step 2: Convert to fraction form
    8,430.69/12,648.09 = 2,808.35/x
  3. Step 3: Cross multiply
    8,430.69x = 12,648.09 × 2,808.35
  4. Step 4: Simplify right side
    8,430.69x = 35,520,200.31
  5. Step 5: Solve for x
    x = 35,520,200.31/8,430.69
  6. Step 6: Final answer
    x = 4,213.20

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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.