Home / 15,319.88-21,137.54-9,351.16

Finding the Fourth Proportional to 15,319.88, 21,137.54 and 9,351.16

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Solution

The fourth proportional to 15,319.88, 21,137.54 and 9,351.16 is: 12,902.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.88 : 21,137.54 = 9,351.16 : x
  2. Step 2: Convert to fraction form
    15,319.88/21,137.54 = 9,351.16/x
  3. Step 3: Cross multiply
    15,319.88x = 21,137.54 × 9,351.16
  4. Step 4: Simplify right side
    15,319.88x = 197,660,518.55
  5. Step 5: Solve for x
    x = 197,660,518.55/15,319.88
  6. Step 6: Final answer
    x = 12,902.22

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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.