Home / 30,890.28-42,628.20-16,742.94

Finding the Fourth Proportional to 30,890.28, 42,628.20 and 16,742.94

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Solution

The fourth proportional to 30,890.28, 42,628.20 and 16,742.94 is: 23,105.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,890.28 : 42,628.20 = 16,742.94 : x
  2. Step 2: Convert to fraction form
    30,890.28/42,628.20 = 16,742.94/x
  3. Step 3: Cross multiply
    30,890.28x = 42,628.20 × 16,742.94
  4. Step 4: Simplify right side
    30,890.28x = 713,721,394.91
  5. Step 5: Solve for x
    x = 713,721,394.91/30,890.28
  6. Step 6: Final answer
    x = 23,105.05

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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.