Home / 28,071.90-42,116.98-18,749.78

Finding the Fourth Proportional to 28,071.90, 42,116.98 and 18,749.78

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Solution

The fourth proportional to 28,071.90, 42,116.98 and 18,749.78 is: 28,130.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,071.90 : 42,116.98 = 18,749.78 : x
  2. Step 2: Convert to fraction form
    28,071.90/42,116.98 = 18,749.78/x
  3. Step 3: Cross multiply
    28,071.90x = 42,116.98 × 18,749.78
  4. Step 4: Simplify right side
    28,071.90x = 789,684,109.26
  5. Step 5: Solve for x
    x = 789,684,109.26/28,071.90
  6. Step 6: Final answer
    x = 28,130.77

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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.