Home / 8,688.45-11,989.92-4,709.49

Finding the Fourth Proportional to 8,688.45, 11,989.92 and 4,709.49

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Solution

The fourth proportional to 8,688.45, 11,989.92 and 4,709.49 is: 6,499.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.45 : 11,989.92 = 4,709.49 : x
  2. Step 2: Convert to fraction form
    8,688.45/11,989.92 = 4,709.49/x
  3. Step 3: Cross multiply
    8,688.45x = 11,989.92 × 4,709.49
  4. Step 4: Simplify right side
    8,688.45x = 56,466,408.34
  5. Step 5: Solve for x
    x = 56,466,408.34/8,688.45
  6. Step 6: Final answer
    x = 6,499.02

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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.