Home / 28,314.32-42,379.06-20,815.89

Finding the Fourth Proportional to 28,314.32, 42,379.06 and 20,815.89

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Solution

The fourth proportional to 28,314.32, 42,379.06 and 20,815.89 is: 31,155.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.32 : 42,379.06 = 20,815.89 : x
  2. Step 2: Convert to fraction form
    28,314.32/42,379.06 = 20,815.89/x
  3. Step 3: Cross multiply
    28,314.32x = 42,379.06 × 20,815.89
  4. Step 4: Simplify right side
    28,314.32x = 882,157,799.22
  5. Step 5: Solve for x
    x = 882,157,799.22/28,314.32
  6. Step 6: Final answer
    x = 31,155.89

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1.5x scale

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.