Home / 30,420.23-41,979.47-16,991.66

Finding the Fourth Proportional to 30,420.23, 41,979.47 and 16,991.66

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Solution

The fourth proportional to 30,420.23, 41,979.47 and 16,991.66 is: 23,448.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.23 : 41,979.47 = 16,991.66 : x
  2. Step 2: Convert to fraction form
    30,420.23/41,979.47 = 16,991.66/x
  3. Step 3: Cross multiply
    30,420.23x = 41,979.47 × 16,991.66
  4. Step 4: Simplify right side
    30,420.23x = 713,300,901.21
  5. Step 5: Solve for x
    x = 713,300,901.21/30,420.23
  6. Step 6: Final answer
    x = 23,448.25

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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.