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Finding the Fourth Proportional to 40,560.40, 60,840.60 and 12,858.40

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Solution

The fourth proportional to 40,560.40, 60,840.60 and 12,858.40 is: 19,287.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,560.40 : 60,840.60 = 12,858.40 : x
  2. Step 2: Convert to fraction form
    40,560.40/60,840.60 = 12,858.40/x
  3. Step 3: Cross multiply
    40,560.40x = 60,840.60 × 12,858.40
  4. Step 4: Simplify right side
    40,560.40x = 782,312,771.04
  5. Step 5: Solve for x
    x = 782,312,771.04/40,560.40
  6. Step 6: Final answer
    x = 19,287.60

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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.