Home / 30,987.56-42,761.66-16,840.10

Finding the Fourth Proportional to 30,987.56, 42,761.66 and 16,840.10

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Solution

The fourth proportional to 30,987.56, 42,761.66 and 16,840.10 is: 23,238.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.56 : 42,761.66 = 16,840.10 : x
  2. Step 2: Convert to fraction form
    30,987.56/42,761.66 = 16,840.10/x
  3. Step 3: Cross multiply
    30,987.56x = 42,761.66 × 16,840.10
  4. Step 4: Simplify right side
    30,987.56x = 720,110,630.57
  5. Step 5: Solve for x
    x = 720,110,630.57/30,987.56
  6. Step 6: Final answer
    x = 23,238.70

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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.