Home / 30,998.58-42,778.17-18,423.42

Finding the Fourth Proportional to 30,998.58, 42,778.17 and 18,423.42

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Solution

The fourth proportional to 30,998.58, 42,778.17 and 18,423.42 is: 25,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998.58 : 42,778.17 = 18,423.42 : x
  2. Step 2: Convert to fraction form
    30,998.58/42,778.17 = 18,423.42/x
  3. Step 3: Cross multiply
    30,998.58x = 42,778.17 × 18,423.42
  4. Step 4: Simplify right side
    30,998.58x = 788,120,192.74
  5. Step 5: Solve for x
    x = 788,120,192.74/30,998.58
  6. Step 6: Final answer
    x = 25,424.40

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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.