Home / 30,705.16-42,378.23-17,782.57

Finding the Fourth Proportional to 30,705.16, 42,378.23 and 17,782.57

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Solution

The fourth proportional to 30,705.16, 42,378.23 and 17,782.57 is: 24,542.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,705.16 : 42,378.23 = 17,782.57 : x
  2. Step 2: Convert to fraction form
    30,705.16/42,378.23 = 17,782.57/x
  3. Step 3: Cross multiply
    30,705.16x = 42,378.23 × 17,782.57
  4. Step 4: Simplify right side
    30,705.16x = 753,593,779.96
  5. Step 5: Solve for x
    x = 753,593,779.96/30,705.16
  6. Step 6: Final answer
    x = 24,542.91

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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.