Home / 30,996.93-42,775.72-18,421.68

Finding the Fourth Proportional to 30,996.93, 42,775.72 and 18,421.68

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Solution

The fourth proportional to 30,996.93, 42,775.72 and 18,421.68 is: 25,421.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,996.93 : 42,775.72 = 18,421.68 : x
  2. Step 2: Convert to fraction form
    30,996.93/42,775.72 = 18,421.68/x
  3. Step 3: Cross multiply
    30,996.93x = 42,775.72 × 18,421.68
  4. Step 4: Simplify right side
    30,996.93x = 788,000,625.61
  5. Step 5: Solve for x
    x = 788,000,625.61/30,996.93
  6. Step 6: Final answer
    x = 25,421.89

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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.