Home / 30,628.41-42,271.89-18,698.73

Finding the Fourth Proportional to 30,628.41, 42,271.89 and 18,698.73

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Solution

The fourth proportional to 30,628.41, 42,271.89 and 18,698.73 is: 25,807.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,628.41 : 42,271.89 = 18,698.73 : x
  2. Step 2: Convert to fraction form
    30,628.41/42,271.89 = 18,698.73/x
  3. Step 3: Cross multiply
    30,628.41x = 42,271.89 × 18,698.73
  4. Step 4: Simplify right side
    30,628.41x = 790,430,657.70
  5. Step 5: Solve for x
    x = 790,430,657.70/30,628.41
  6. Step 6: Final answer
    x = 25,807.11

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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.