Home / 8,688.54-11,990.16-4,709.74

Finding the Fourth Proportional to 8,688.54, 11,990.16 and 4,709.74

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Solution

The fourth proportional to 8,688.54, 11,990.16 and 4,709.74 is: 6,499.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,688.54 : 11,990.16 = 4,709.74 : x
  2. Step 2: Convert to fraction form
    8,688.54/11,990.16 = 4,709.74/x
  3. Step 3: Cross multiply
    8,688.54x = 11,990.16 × 4,709.74
  4. Step 4: Simplify right side
    8,688.54x = 56,470,536.16
  5. Step 5: Solve for x
    x = 56,470,536.16/8,688.54
  6. Step 6: Final answer
    x = 6,499.43

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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.