Home / 28,718.08-43,085.30-20,828.48

Finding the Fourth Proportional to 28,718.08, 43,085.30 and 20,828.48

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Solution

The fourth proportional to 28,718.08, 43,085.30 and 20,828.48 is: 31,248.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.08 : 43,085.30 = 20,828.48 : x
  2. Step 2: Convert to fraction form
    28,718.08/43,085.30 = 20,828.48/x
  3. Step 3: Cross multiply
    28,718.08x = 43,085.30 × 20,828.48
  4. Step 4: Simplify right side
    28,718.08x = 897,400,989.78
  5. Step 5: Solve for x
    x = 897,400,989.78/28,718.08
  6. Step 6: Final answer
    x = 31,248.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.