Home / 30,420.16-41,975.36-16,989.76

Finding the Fourth Proportional to 30,420.16, 41,975.36 and 16,989.76

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Solution

The fourth proportional to 30,420.16, 41,975.36 and 16,989.76 is: 23,443.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,420.16 : 41,975.36 = 16,989.76 : x
  2. Step 2: Convert to fraction form
    30,420.16/41,975.36 = 16,989.76/x
  3. Step 3: Cross multiply
    30,420.16x = 41,975.36 × 16,989.76
  4. Step 4: Simplify right side
    30,420.16x = 713,151,292.31
  5. Step 5: Solve for x
    x = 713,151,292.31/30,420.16
  6. Step 6: Final answer
    x = 23,443.38

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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.