Home / 11,471.68-15,828.16-6,688.72

Finding the Fourth Proportional to 11,471.68, 15,828.16 and 6,688.72

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Solution

The fourth proportional to 11,471.68, 15,828.16 and 6,688.72 is: 9,228.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,471.68 : 15,828.16 = 6,688.72 : x
  2. Step 2: Convert to fraction form
    11,471.68/15,828.16 = 6,688.72/x
  3. Step 3: Cross multiply
    11,471.68x = 15,828.16 × 6,688.72
  4. Step 4: Simplify right side
    11,471.68x = 105,870,130.36
  5. Step 5: Solve for x
    x = 105,870,130.36/11,471.68
  6. Step 6: Final answer
    x = 9,228.83

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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.