Home / 30,912.81-42,643.98-19,563.18

Finding the Fourth Proportional to 30,912.81, 42,643.98 and 19,563.18

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Solution

The fourth proportional to 30,912.81, 42,643.98 and 19,563.18 is: 26,987.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,912.81 : 42,643.98 = 19,563.18 : x
  2. Step 2: Convert to fraction form
    30,912.81/42,643.98 = 19,563.18/x
  3. Step 3: Cross multiply
    30,912.81x = 42,643.98 × 19,563.18
  4. Step 4: Simplify right side
    30,912.81x = 834,251,856.66
  5. Step 5: Solve for x
    x = 834,251,856.66/30,912.81
  6. Step 6: Final answer
    x = 26,987.25

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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.