Home / 30,985.25-42,759.70-16,838.06

Finding the Fourth Proportional to 30,985.25, 42,759.70 and 16,838.06

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Solution

The fourth proportional to 30,985.25, 42,759.70 and 16,838.06 is: 23,236.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,985.25 : 42,759.70 = 16,838.06 : x
  2. Step 2: Convert to fraction form
    30,985.25/42,759.70 = 16,838.06/x
  3. Step 3: Cross multiply
    30,985.25x = 42,759.70 × 16,838.06
  4. Step 4: Simplify right side
    30,985.25x = 719,990,138.29
  5. Step 5: Solve for x
    x = 719,990,138.29/30,985.25
  6. Step 6: Final answer
    x = 23,236.55

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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.