Home / 21,140.44-31,708.80-12,817.99

Finding the Fourth Proportional to 21,140.44, 31,708.80 and 12,817.99

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Solution

The fourth proportional to 21,140.44, 31,708.80 and 12,817.99 is: 19,225.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.44 : 31,708.80 = 12,817.99 : x
  2. Step 2: Convert to fraction form
    21,140.44/31,708.80 = 12,817.99/x
  3. Step 3: Cross multiply
    21,140.44x = 31,708.80 × 12,817.99
  4. Step 4: Simplify right side
    21,140.44x = 406,443,081.31
  5. Step 5: Solve for x
    x = 406,443,081.31/21,140.44
  6. Step 6: Final answer
    x = 19,225.86

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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.