Home / 30,630.96-42,275.31-18,701.22

Finding the Fourth Proportional to 30,630.96, 42,275.31 and 18,701.22

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Solution

The fourth proportional to 30,630.96, 42,275.31 and 18,701.22 is: 25,810.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,630.96 : 42,275.31 = 18,701.22 : x
  2. Step 2: Convert to fraction form
    30,630.96/42,275.31 = 18,701.22/x
  3. Step 3: Cross multiply
    30,630.96x = 42,275.31 × 18,701.22
  4. Step 4: Simplify right side
    30,630.96x = 790,599,872.88
  5. Step 5: Solve for x
    x = 790,599,872.88/30,630.96
  6. Step 6: Final answer
    x = 25,810.48

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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.