Home / 30,487.14-42,063.90-20,929.44

Finding the Fourth Proportional to 30,487.14, 42,063.90 and 20,929.44

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Solution

The fourth proportional to 30,487.14, 42,063.90 and 20,929.44 is: 28,876.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,487.14 : 42,063.90 = 20,929.44 : x
  2. Step 2: Convert to fraction form
    30,487.14/42,063.90 = 20,929.44/x
  3. Step 3: Cross multiply
    30,487.14x = 42,063.90 × 20,929.44
  4. Step 4: Simplify right side
    30,487.14x = 880,373,871.22
  5. Step 5: Solve for x
    x = 880,373,871.22/30,487.14
  6. Step 6: Final answer
    x = 28,876.89

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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.