Home / 8,688.20-11,989.74-4,709.32

Finding the Fourth Proportional to 8,688.20, 11,989.74 and 4,709.32

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Solution

The fourth proportional to 8,688.20, 11,989.74 and 4,709.32 is: 6,498.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.20 : 11,989.74 = 4,709.32 : x
  2. Step 2: Convert to fraction form
    8,688.20/11,989.74 = 4,709.32/x
  3. Step 3: Cross multiply
    8,688.20x = 11,989.74 × 4,709.32
  4. Step 4: Simplify right side
    8,688.20x = 56,463,546.74
  5. Step 5: Solve for x
    x = 56,463,546.74/8,688.20
  6. Step 6: Final answer
    x = 6,498.88

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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.