Home / 20,718.81-28,588.74-11,642.37

Finding the Fourth Proportional to 20,718.81, 28,588.74 and 11,642.37

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Solution

The fourth proportional to 20,718.81, 28,588.74 and 11,642.37 is: 16,064.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.81 : 28,588.74 = 11,642.37 : x
  2. Step 2: Convert to fraction form
    20,718.81/28,588.74 = 11,642.37/x
  3. Step 3: Cross multiply
    20,718.81x = 28,588.74 × 11,642.37
  4. Step 4: Simplify right side
    20,718.81x = 332,840,688.91
  5. Step 5: Solve for x
    x = 332,840,688.91/20,718.81
  6. Step 6: Final answer
    x = 16,064.66

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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.