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Finding the Fourth Proportional to 40,415.40, 60,623.10 and 20,687.40

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Solution

The fourth proportional to 40,415.40, 60,623.10 and 20,687.40 is: 31,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,415.40 : 60,623.10 = 20,687.40 : x
  2. Step 2: Convert to fraction form
    40,415.40/60,623.10 = 20,687.40/x
  3. Step 3: Cross multiply
    40,415.40x = 60,623.10 × 20,687.40
  4. Step 4: Simplify right side
    40,415.40x = 1,254,134,318.94
  5. Step 5: Solve for x
    x = 1,254,134,318.94/40,415.40
  6. Step 6: Final answer
    x = 31,031.10

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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.