Home / 30,587.98-42,166.73-21,619.66

Finding the Fourth Proportional to 30,587.98, 42,166.73 and 21,619.66

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Solution

The fourth proportional to 30,587.98, 42,166.73 and 21,619.66 is: 29,803.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,587.98 : 42,166.73 = 21,619.66 : x
  2. Step 2: Convert to fraction form
    30,587.98/42,166.73 = 21,619.66/x
  3. Step 3: Cross multiply
    30,587.98x = 42,166.73 × 21,619.66
  4. Step 4: Simplify right side
    30,587.98x = 911,630,365.91
  5. Step 5: Solve for x
    x = 911,630,365.91/30,587.98
  6. Step 6: Final answer
    x = 29,803.55

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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.