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Finding the Fourth Proportional to 8,641.86, 12,962.64 and 2,798.48

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Solution

The fourth proportional to 8,641.86, 12,962.64 and 2,798.48 is: 4,197.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,641.86 : 12,962.64 = 2,798.48 : x
  2. Step 2: Convert to fraction form
    8,641.86/12,962.64 = 2,798.48/x
  3. Step 3: Cross multiply
    8,641.86x = 12,962.64 × 2,798.48
  4. Step 4: Simplify right side
    8,641.86x = 36,275,688.79
  5. Step 5: Solve for x
    x = 36,275,688.79/8,641.86
  6. Step 6: Final answer
    x = 4,197.67

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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.