Home / 42,021.08-63,012.36-12,428.36

Finding the Fourth Proportional to 42,021.08, 63,012.36 and 12,428.36

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Solution

The fourth proportional to 42,021.08, 63,012.36 and 12,428.36 is: 18,636.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,021.08 : 63,012.36 = 12,428.36 : x
  2. Step 2: Convert to fraction form
    42,021.08/63,012.36 = 12,428.36/x
  3. Step 3: Cross multiply
    42,021.08x = 63,012.36 × 12,428.36
  4. Step 4: Simplify right side
    42,021.08x = 783,140,294.53
  5. Step 5: Solve for x
    x = 783,140,294.53/42,021.08
  6. Step 6: Final answer
    x = 18,636.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.