Home / 30,679.23-45,991.15-21,323.66

Finding the Fourth Proportional to 30,679.23, 45,991.15 and 21,323.66

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Solution

The fourth proportional to 30,679.23, 45,991.15 and 21,323.66 is: 31,966.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,679.23 : 45,991.15 = 21,323.66 : x
  2. Step 2: Convert to fraction form
    30,679.23/45,991.15 = 21,323.66/x
  3. Step 3: Cross multiply
    30,679.23x = 45,991.15 × 21,323.66
  4. Step 4: Simplify right side
    30,679.23x = 980,699,422.32
  5. Step 5: Solve for x
    x = 980,699,422.32/30,679.23
  6. Step 6: Final answer
    x = 31,966.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.