Home / 31,739.16-43,802.76-18,311

Finding the Fourth Proportional to 31,739.16, 43,802.76 and 18,311

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Solution

The fourth proportional to 31,739.16, 43,802.76 and 18,311 is: 25,270.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,739.16 : 43,802.76 = 18,311 : x
  2. Step 2: Convert to fraction form
    31,739.16/43,802.76 = 18,311/x
  3. Step 3: Cross multiply
    31,739.16x = 43,802.76 × 18,311
  4. Step 4: Simplify right side
    31,739.16x = 802,072,338.36
  5. Step 5: Solve for x
    x = 802,072,338.36/31,739.16
  6. Step 6: Final answer
    x = 25,270.75

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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.