Home / 30,450.40-42,019.23-18,512.08

Finding the Fourth Proportional to 30,450.40, 42,019.23 and 18,512.08

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Solution

The fourth proportional to 30,450.40, 42,019.23 and 18,512.08 is: 25,545.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,450.40 : 42,019.23 = 18,512.08 : x
  2. Step 2: Convert to fraction form
    30,450.40/42,019.23 = 18,512.08/x
  3. Step 3: Cross multiply
    30,450.40x = 42,019.23 × 18,512.08
  4. Step 4: Simplify right side
    30,450.40x = 777,863,347.30
  5. Step 5: Solve for x
    x = 777,863,347.30/30,450.40
  6. Step 6: Final answer
    x = 25,545.26

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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.