Home / 15,357.60-21,188.21-9,309.79

Finding the Fourth Proportional to 15,357.60, 21,188.21 and 9,309.79

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Solution

The fourth proportional to 15,357.60, 21,188.21 and 9,309.79 is: 12,844.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.60 : 21,188.21 = 9,309.79 : x
  2. Step 2: Convert to fraction form
    15,357.60/21,188.21 = 9,309.79/x
  3. Step 3: Cross multiply
    15,357.60x = 21,188.21 × 9,309.79
  4. Step 4: Simplify right side
    15,357.60x = 197,257,765.51
  5. Step 5: Solve for x
    x = 197,257,765.51/15,357.60
  6. Step 6: Final answer
    x = 12,844.31

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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.