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Finding the Fourth Proportional to 40,405.36, 60,620.36 and 20,697.84

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Solution

The fourth proportional to 40,405.36, 60,620.36 and 20,697.84 is: 31,053.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,405.36 : 60,620.36 = 20,697.84 : x
  2. Step 2: Convert to fraction form
    40,405.36/60,620.36 = 20,697.84/x
  3. Step 3: Cross multiply
    40,405.36x = 60,620.36 × 20,697.84
  4. Step 4: Simplify right side
    40,405.36x = 1,254,710,512.02
  5. Step 5: Solve for x
    x = 1,254,710,512.02/40,405.36
  6. Step 6: Final answer
    x = 31,053.07

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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.