Home / 30,927.70-42,653.91-21,518.74

Finding the Fourth Proportional to 30,927.70, 42,653.91 and 21,518.74

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Solution

The fourth proportional to 30,927.70, 42,653.91 and 21,518.74 is: 29,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,927.70 : 42,653.91 = 21,518.74 : x
  2. Step 2: Convert to fraction form
    30,927.70/42,653.91 = 21,518.74/x
  3. Step 3: Cross multiply
    30,927.70x = 42,653.91 × 21,518.74
  4. Step 4: Simplify right side
    30,927.70x = 917,858,399.27
  5. Step 5: Solve for x
    x = 917,858,399.27/30,927.70
  6. Step 6: Final answer
    x = 29,677.55

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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.