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Finding the Fourth Proportional to 35,661.40, 53,491.24 and 20,690.88

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Solution

The fourth proportional to 35,661.40, 53,491.24 and 20,690.88 is: 31,035.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,661.40 : 53,491.24 = 20,690.88 : x
  2. Step 2: Convert to fraction form
    35,661.40/53,491.24 = 20,690.88/x
  3. Step 3: Cross multiply
    35,661.40x = 53,491.24 × 20,690.88
  4. Step 4: Simplify right side
    35,661.40x = 1,106,780,827.89
  5. Step 5: Solve for x
    x = 1,106,780,827.89/35,661.40
  6. Step 6: Final answer
    x = 31,035.82

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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.