Home / 31,438.76-43,379.70-18,696.20

Finding the Fourth Proportional to 31,438.76, 43,379.70 and 18,696.20

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Solution

The fourth proportional to 31,438.76, 43,379.70 and 18,696.20 is: 25,797.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,438.76 : 43,379.70 = 18,696.20 : x
  2. Step 2: Convert to fraction form
    31,438.76/43,379.70 = 18,696.20/x
  3. Step 3: Cross multiply
    31,438.76x = 43,379.70 × 18,696.20
  4. Step 4: Simplify right side
    31,438.76x = 811,035,547.14
  5. Step 5: Solve for x
    x = 811,035,547.14/31,438.76
  6. Step 6: Final answer
    x = 25,797.31

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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.