Home / 30,932.93-42,722.25-20,902.79

Finding the Fourth Proportional to 30,932.93, 42,722.25 and 20,902.79

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Solution

The fourth proportional to 30,932.93, 42,722.25 and 20,902.79 is: 28,869.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,932.93 : 42,722.25 = 20,902.79 : x
  2. Step 2: Convert to fraction form
    30,932.93/42,722.25 = 20,902.79/x
  3. Step 3: Cross multiply
    30,932.93x = 42,722.25 × 20,902.79
  4. Step 4: Simplify right side
    30,932.93x = 893,014,220.08
  5. Step 5: Solve for x
    x = 893,014,220.08/30,932.93
  6. Step 6: Final answer
    x = 28,869.37

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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.