Home / 30,705.03-42,378.06-17,782.45

Finding the Fourth Proportional to 30,705.03, 42,378.06 and 17,782.45

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Solution

The fourth proportional to 30,705.03, 42,378.06 and 17,782.45 is: 24,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,705.03 : 42,378.06 = 17,782.45 : x
  2. Step 2: Convert to fraction form
    30,705.03/42,378.06 = 17,782.45/x
  3. Step 3: Cross multiply
    30,705.03x = 42,378.06 × 17,782.45
  4. Step 4: Simplify right side
    30,705.03x = 753,585,733.05
  5. Step 5: Solve for x
    x = 753,585,733.05/30,705.03
  6. Step 6: Final answer
    x = 24,542.75

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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.