Home / 28,090-42,147.30-13,309.48

Finding the Fourth Proportional to 28,090, 42,147.30 and 13,309.48

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Solution

The fourth proportional to 28,090, 42,147.30 and 13,309.48 is: 19,970.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,090 : 42,147.30 = 13,309.48 : x
  2. Step 2: Convert to fraction form
    28,090/42,147.30 = 13,309.48/x
  3. Step 3: Cross multiply
    28,090x = 42,147.30 × 13,309.48
  4. Step 4: Simplify right side
    28,090x = 560,958,646.40
  5. Step 5: Solve for x
    x = 560,958,646.40/28,090
  6. Step 6: Final answer
    x = 19,970.05

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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.