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Finding the Fourth Proportional to 38,485.60, 57,728.40 and 23,711.20

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Solution

The fourth proportional to 38,485.60, 57,728.40 and 23,711.20 is: 35,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,485.60 : 57,728.40 = 23,711.20 : x
  2. Step 2: Convert to fraction form
    38,485.60/57,728.40 = 23,711.20/x
  3. Step 3: Cross multiply
    38,485.60x = 57,728.40 × 23,711.20
  4. Step 4: Simplify right side
    38,485.60x = 1,368,809,638.08
  5. Step 5: Solve for x
    x = 1,368,809,638.08/38,485.60
  6. Step 6: Final answer
    x = 35,566.80

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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.