Home / 30,628.40-42,273.78-18,689.18

Finding the Fourth Proportional to 30,628.40, 42,273.78 and 18,689.18

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Solution

The fourth proportional to 30,628.40, 42,273.78 and 18,689.18 is: 25,795.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.40 : 42,273.78 = 18,689.18 : x
  2. Step 2: Convert to fraction form
    30,628.40/42,273.78 = 18,689.18/x
  3. Step 3: Cross multiply
    30,628.40x = 42,273.78 × 18,689.18
  4. Step 4: Simplify right side
    30,628.40x = 790,062,283.70
  5. Step 5: Solve for x
    x = 790,062,283.70/30,628.40
  6. Step 6: Final answer
    x = 25,795.09

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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.