Home / 23,148.40-31,963.08-21,379.28

Finding the Fourth Proportional to 23,148.40, 31,963.08 and 21,379.28

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Solution

The fourth proportional to 23,148.40, 31,963.08 and 21,379.28 is: 29,520.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,148.40 : 31,963.08 = 21,379.28 : x
  2. Step 2: Convert to fraction form
    23,148.40/31,963.08 = 21,379.28/x
  3. Step 3: Cross multiply
    23,148.40x = 31,963.08 × 21,379.28
  4. Step 4: Simplify right side
    23,148.40x = 683,347,636.98
  5. Step 5: Solve for x
    x = 683,347,636.98/23,148.40
  6. Step 6: Final answer
    x = 29,520.30

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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.