Home / 30,953.18-42,725.56-18,205.80

Finding the Fourth Proportional to 30,953.18, 42,725.56 and 18,205.80

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Solution

The fourth proportional to 30,953.18, 42,725.56 and 18,205.80 is: 25,129.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,953.18 : 42,725.56 = 18,205.80 : x
  2. Step 2: Convert to fraction form
    30,953.18/42,725.56 = 18,205.80/x
  3. Step 3: Cross multiply
    30,953.18x = 42,725.56 × 18,205.80
  4. Step 4: Simplify right side
    30,953.18x = 777,853,000.25
  5. Step 5: Solve for x
    x = 777,853,000.25/30,953.18
  6. Step 6: Final answer
    x = 25,129.99

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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.