Home / 30,967.88-42,710.82-20,353.64

Finding the Fourth Proportional to 30,967.88, 42,710.82 and 20,353.64

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Solution

The fourth proportional to 30,967.88, 42,710.82 and 20,353.64 is: 28,071.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,967.88 : 42,710.82 = 20,353.64 : x
  2. Step 2: Convert to fraction form
    30,967.88/42,710.82 = 20,353.64/x
  3. Step 3: Cross multiply
    30,967.88x = 42,710.82 × 20,353.64
  4. Step 4: Simplify right side
    30,967.88x = 869,320,654.38
  5. Step 5: Solve for x
    x = 869,320,654.38/30,967.88
  6. Step 6: Final answer
    x = 28,071.69

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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.