Home / 8,688.87-11,990.63-4,709.95

Finding the Fourth Proportional to 8,688.87, 11,990.63 and 4,709.95

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Solution

The fourth proportional to 8,688.87, 11,990.63 and 4,709.95 is: 6,499.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.87 : 11,990.63 = 4,709.95 : x
  2. Step 2: Convert to fraction form
    8,688.87/11,990.63 = 4,709.95/x
  3. Step 3: Cross multiply
    8,688.87x = 11,990.63 × 4,709.95
  4. Step 4: Simplify right side
    8,688.87x = 56,475,249.57
  5. Step 5: Solve for x
    x = 56,475,249.57/8,688.87
  6. Step 6: Final answer
    x = 6,499.72

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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.