Home / 30,555.66-42,087.94-21,587.60

Finding the Fourth Proportional to 30,555.66, 42,087.94 and 21,587.60

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Solution

The fourth proportional to 30,555.66, 42,087.94 and 21,587.60 is: 29,735.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,555.66 : 42,087.94 = 21,587.60 : x
  2. Step 2: Convert to fraction form
    30,555.66/42,087.94 = 21,587.60/x
  3. Step 3: Cross multiply
    30,555.66x = 42,087.94 × 21,587.60
  4. Step 4: Simplify right side
    30,555.66x = 908,577,295.17
  5. Step 5: Solve for x
    x = 908,577,295.17/30,555.66
  6. Step 6: Final answer
    x = 29,735.16

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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.