Home / 15,309.39-21,129.27-9,344.53

Finding the Fourth Proportional to 15,309.39, 21,129.27 and 9,344.53

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Solution

The fourth proportional to 15,309.39, 21,129.27 and 9,344.53 is: 12,896.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.39 : 21,129.27 = 9,344.53 : x
  2. Step 2: Convert to fraction form
    15,309.39/21,129.27 = 9,344.53/x
  3. Step 3: Cross multiply
    15,309.39x = 21,129.27 × 9,344.53
  4. Step 4: Simplify right side
    15,309.39x = 197,443,012.76
  5. Step 5: Solve for x
    x = 197,443,012.76/15,309.39
  6. Step 6: Final answer
    x = 12,896.85

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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.