Home / 30,590.88-42,211.73-16,978.86

Finding the Fourth Proportional to 30,590.88, 42,211.73 and 16,978.86

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Solution

The fourth proportional to 30,590.88, 42,211.73 and 16,978.86 is: 23,428.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,590.88 : 42,211.73 = 16,978.86 : x
  2. Step 2: Convert to fraction form
    30,590.88/42,211.73 = 16,978.86/x
  3. Step 3: Cross multiply
    30,590.88x = 42,211.73 × 16,978.86
  4. Step 4: Simplify right side
    30,590.88x = 716,706,969.13
  5. Step 5: Solve for x
    x = 716,706,969.13/30,590.88
  6. Step 6: Final answer
    x = 23,428.78

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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.