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Finding the Fourth Proportional to 28,912.60, 40,425.80 and 28,912.60

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Solution

The fourth proportional to 28,912.60, 40,425.80 and 28,912.60 is: 40,425.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,912.60 : 40,425.80 = 28,912.60 : x
  2. Step 2: Convert to fraction form
    28,912.60/40,425.80 = 28,912.60/x
  3. Step 3: Cross multiply
    28,912.60x = 40,425.80 × 28,912.60
  4. Step 4: Simplify right side
    28,912.60x = 1,168,814,985.08
  5. Step 5: Solve for x
    x = 1,168,814,985.08/28,912.60
  6. Step 6: Final answer
    x = 40,425.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.