Home / 28,317.60-39,085.20-17,143.20

Finding the Fourth Proportional to 28,317.60, 39,085.20 and 17,143.20

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Solution

The fourth proportional to 28,317.60, 39,085.20 and 17,143.20 is: 23,661.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,317.60 : 39,085.20 = 17,143.20 : x
  2. Step 2: Convert to fraction form
    28,317.60/39,085.20 = 17,143.20/x
  3. Step 3: Cross multiply
    28,317.60x = 39,085.20 × 17,143.20
  4. Step 4: Simplify right side
    28,317.60x = 670,045,400.64
  5. Step 5: Solve for x
    x = 670,045,400.64/28,317.60
  6. Step 6: Final answer
    x = 23,661.80

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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.