Home / 23,120.21-31,905.89-12,509.85

Finding the Fourth Proportional to 23,120.21, 31,905.89 and 12,509.85

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Solution

The fourth proportional to 23,120.21, 31,905.89 and 12,509.85 is: 17,263.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,120.21 : 31,905.89 = 12,509.85 : x
  2. Step 2: Convert to fraction form
    23,120.21/31,905.89 = 12,509.85/x
  3. Step 3: Cross multiply
    23,120.21x = 31,905.89 × 12,509.85
  4. Step 4: Simplify right side
    23,120.21x = 399,137,809.64
  5. Step 5: Solve for x
    x = 399,137,809.64/23,120.21
  6. Step 6: Final answer
    x = 17,263.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.