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Finding the Fourth Proportional to 53,915.20, 80,834.40 and 20,622.40

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Solution

The fourth proportional to 53,915.20, 80,834.40 and 20,622.40 is: 30,918.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,915.20 : 80,834.40 = 20,622.40 : x
  2. Step 2: Convert to fraction form
    53,915.20/80,834.40 = 20,622.40/x
  3. Step 3: Cross multiply
    53,915.20x = 80,834.40 × 20,622.40
  4. Step 4: Simplify right side
    53,915.20x = 1,666,999,330.56
  5. Step 5: Solve for x
    x = 1,666,999,330.56/53,915.20
  6. Step 6: Final answer
    x = 30,918.91

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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.