Home / 30,972.86-42,742.31-16,825.80

Finding the Fourth Proportional to 30,972.86, 42,742.31 and 16,825.80

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Solution

The fourth proportional to 30,972.86, 42,742.31 and 16,825.80 is: 23,219.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,972.86 : 42,742.31 = 16,825.80 : x
  2. Step 2: Convert to fraction form
    30,972.86/42,742.31 = 16,825.80/x
  3. Step 3: Cross multiply
    30,972.86x = 42,742.31 × 16,825.80
  4. Step 4: Simplify right side
    30,972.86x = 719,173,475.47
  5. Step 5: Solve for x
    x = 719,173,475.47/30,972.86
  6. Step 6: Final answer
    x = 23,219.48

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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.