Home / 30,987.23-42,761.51-16,840.07

Finding the Fourth Proportional to 30,987.23, 42,761.51 and 16,840.07

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Solution

The fourth proportional to 30,987.23, 42,761.51 and 16,840.07 is: 23,238.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.23 : 42,761.51 = 16,840.07 : x
  2. Step 2: Convert to fraction form
    30,987.23/42,761.51 = 16,840.07/x
  3. Step 3: Cross multiply
    30,987.23x = 42,761.51 × 16,840.07
  4. Step 4: Simplify right side
    30,987.23x = 720,106,523.70
  5. Step 5: Solve for x
    x = 720,106,523.70/30,987.23
  6. Step 6: Final answer
    x = 23,238.82

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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.