Home / 30,902.51-42,645.79-18,156.22

Finding the Fourth Proportional to 30,902.51, 42,645.79 and 18,156.22

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Solution

The fourth proportional to 30,902.51, 42,645.79 and 18,156.22 is: 25,055.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,902.51 : 42,645.79 = 18,156.22 : x
  2. Step 2: Convert to fraction form
    30,902.51/42,645.79 = 18,156.22/x
  3. Step 3: Cross multiply
    30,902.51x = 42,645.79 × 18,156.22
  4. Step 4: Simplify right side
    30,902.51x = 774,286,345.31
  5. Step 5: Solve for x
    x = 774,286,345.31/30,902.51
  6. Step 6: Final answer
    x = 25,055.78

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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.