Home / 28,051.57-42,034.78-20,620.63

Finding the Fourth Proportional to 28,051.57, 42,034.78 and 20,620.63

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Solution

The fourth proportional to 28,051.57, 42,034.78 and 20,620.63 is: 30,899.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,051.57 : 42,034.78 = 20,620.63 : x
  2. Step 2: Convert to fraction form
    28,051.57/42,034.78 = 20,620.63/x
  3. Step 3: Cross multiply
    28,051.57x = 42,034.78 × 20,620.63
  4. Step 4: Simplify right side
    28,051.57x = 866,783,645.51
  5. Step 5: Solve for x
    x = 866,783,645.51/28,051.57
  6. Step 6: Final answer
    x = 30,899.65

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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.