Home / 30,730.94-42,412.28-18,631.26

Finding the Fourth Proportional to 30,730.94, 42,412.28 and 18,631.26

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Solution

The fourth proportional to 30,730.94, 42,412.28 and 18,631.26 is: 25,713.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,730.94 : 42,412.28 = 18,631.26 : x
  2. Step 2: Convert to fraction form
    30,730.94/42,412.28 = 18,631.26/x
  3. Step 3: Cross multiply
    30,730.94x = 42,412.28 × 18,631.26
  4. Step 4: Simplify right side
    30,730.94x = 790,194,122.72
  5. Step 5: Solve for x
    x = 790,194,122.72/30,730.94
  6. Step 6: Final answer
    x = 25,713.31

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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.