Home / 20,279.36-30,399.60-16,108.40

Finding the Fourth Proportional to 20,279.36, 30,399.60 and 16,108.40

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Solution

The fourth proportional to 20,279.36, 30,399.60 and 16,108.40 is: 24,147.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279.36 : 30,399.60 = 16,108.40 : x
  2. Step 2: Convert to fraction form
    20,279.36/30,399.60 = 16,108.40/x
  3. Step 3: Cross multiply
    20,279.36x = 30,399.60 × 16,108.40
  4. Step 4: Simplify right side
    20,279.36x = 489,688,916.64
  5. Step 5: Solve for x
    x = 489,688,916.64/20,279.36
  6. Step 6: Final answer
    x = 24,147.16

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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.