Home / 30,865.45-42,594.30-18,118.63

Finding the Fourth Proportional to 30,865.45, 42,594.30 and 18,118.63

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Solution

The fourth proportional to 30,865.45, 42,594.30 and 18,118.63 is: 25,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,865.45 : 42,594.30 = 18,118.63 : x
  2. Step 2: Convert to fraction form
    30,865.45/42,594.30 = 18,118.63/x
  3. Step 3: Cross multiply
    30,865.45x = 42,594.30 × 18,118.63
  4. Step 4: Simplify right side
    30,865.45x = 771,750,221.35
  5. Step 5: Solve for x
    x = 771,750,221.35/30,865.45
  6. Step 6: Final answer
    x = 25,003.70

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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.