Home / 31,386.51-43,308.14-18,811.26

Finding the Fourth Proportional to 31,386.51, 43,308.14 and 18,811.26

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Solution

The fourth proportional to 31,386.51, 43,308.14 and 18,811.26 is: 25,956.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,386.51 : 43,308.14 = 18,811.26 : x
  2. Step 2: Convert to fraction form
    31,386.51/43,308.14 = 18,811.26/x
  3. Step 3: Cross multiply
    31,386.51x = 43,308.14 × 18,811.26
  4. Step 4: Simplify right side
    31,386.51x = 814,680,587.60
  5. Step 5: Solve for x
    x = 814,680,587.60/31,386.51
  6. Step 6: Final answer
    x = 25,956.39

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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.