Home / 30,911.38-42,657.72-16,764.28

Finding the Fourth Proportional to 30,911.38, 42,657.72 and 16,764.28

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Solution

The fourth proportional to 30,911.38, 42,657.72 and 16,764.28 is: 23,134.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,911.38 : 42,657.72 = 16,764.28 : x
  2. Step 2: Convert to fraction form
    30,911.38/42,657.72 = 16,764.28/x
  3. Step 3: Cross multiply
    30,911.38x = 42,657.72 × 16,764.28
  4. Step 4: Simplify right side
    30,911.38x = 715,125,962.24
  5. Step 5: Solve for x
    x = 715,125,962.24/30,911.38
  6. Step 6: Final answer
    x = 23,134.71

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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.