Home / 28,314.45-42,431.37-20,860.29

Finding the Fourth Proportional to 28,314.45, 42,431.37 and 20,860.29

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Solution

The fourth proportional to 28,314.45, 42,431.37 and 20,860.29 is: 31,260.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,314.45 : 42,431.37 = 20,860.29 : x
  2. Step 2: Convert to fraction form
    28,314.45/42,431.37 = 20,860.29/x
  3. Step 3: Cross multiply
    28,314.45x = 42,431.37 × 20,860.29
  4. Step 4: Simplify right side
    28,314.45x = 885,130,683.30
  5. Step 5: Solve for x
    x = 885,130,683.30/28,314.45
  6. Step 6: Final answer
    x = 31,260.74

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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.