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Finding the Fourth Proportional to 43,152.40, 64,728.60 and 13,579.30

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Solution

The fourth proportional to 43,152.40, 64,728.60 and 13,579.30 is: 20,368.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,152.40 : 64,728.60 = 13,579.30 : x
  2. Step 2: Convert to fraction form
    43,152.40/64,728.60 = 13,579.30/x
  3. Step 3: Cross multiply
    43,152.40x = 64,728.60 × 13,579.30
  4. Step 4: Simplify right side
    43,152.40x = 878,969,077.98
  5. Step 5: Solve for x
    x = 878,969,077.98/43,152.40
  6. Step 6: Final answer
    x = 20,368.95

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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.