Home / 30,420.59-41,975.52-16,991.15

Finding the Fourth Proportional to 30,420.59, 41,975.52 and 16,991.15

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Solution

The fourth proportional to 30,420.59, 41,975.52 and 16,991.15 is: 23,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.59 : 41,975.52 = 16,991.15 : x
  2. Step 2: Convert to fraction form
    30,420.59/41,975.52 = 16,991.15/x
  3. Step 3: Cross multiply
    30,420.59x = 41,975.52 × 16,991.15
  4. Step 4: Simplify right side
    30,420.59x = 713,212,356.65
  5. Step 5: Solve for x
    x = 713,212,356.65/30,420.59
  6. Step 6: Final answer
    x = 23,445.05

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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.