Home / 28,491.60-39,310.40-16,391.45

Finding the Fourth Proportional to 28,491.60, 39,310.40 and 16,391.45

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Solution

The fourth proportional to 28,491.60, 39,310.40 and 16,391.45 is: 22,615.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491.60 : 39,310.40 = 16,391.45 : x
  2. Step 2: Convert to fraction form
    28,491.60/39,310.40 = 16,391.45/x
  3. Step 3: Cross multiply
    28,491.60x = 39,310.40 × 16,391.45
  4. Step 4: Simplify right side
    28,491.60x = 644,354,177.57
  5. Step 5: Solve for x
    x = 644,354,177.57/28,491.60
  6. Step 6: Final answer
    x = 22,615.58

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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.