Home / 30,724.95-42,420.82-19,257.10

Finding the Fourth Proportional to 30,724.95, 42,420.82 and 19,257.10

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Solution

The fourth proportional to 30,724.95, 42,420.82 and 19,257.10 is: 26,587.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,724.95 : 42,420.82 = 19,257.10 : x
  2. Step 2: Convert to fraction form
    30,724.95/42,420.82 = 19,257.10/x
  3. Step 3: Cross multiply
    30,724.95x = 42,420.82 × 19,257.10
  4. Step 4: Simplify right side
    30,724.95x = 816,901,760.72
  5. Step 5: Solve for x
    x = 816,901,760.72/30,724.95
  6. Step 6: Final answer
    x = 26,587.57

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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.