Home / 15,319.05-21,138.63-8,605.41

Finding the Fourth Proportional to 15,319.05, 21,138.63 and 8,605.41

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Solution

The fourth proportional to 15,319.05, 21,138.63 and 8,605.41 is: 11,874.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.05 : 21,138.63 = 8,605.41 : x
  2. Step 2: Convert to fraction form
    15,319.05/21,138.63 = 8,605.41/x
  3. Step 3: Cross multiply
    15,319.05x = 21,138.63 × 8,605.41
  4. Step 4: Simplify right side
    15,319.05x = 181,906,577.99
  5. Step 5: Solve for x
    x = 181,906,577.99/15,319.05
  6. Step 6: Final answer
    x = 11,874.53

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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.