Home / 15,318.56-21,147.64-10,309.12

Finding the Fourth Proportional to 15,318.56, 21,147.64 and 10,309.12

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Solution

The fourth proportional to 15,318.56, 21,147.64 and 10,309.12 is: 14,231.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.56 : 21,147.64 = 10,309.12 : x
  2. Step 2: Convert to fraction form
    15,318.56/21,147.64 = 10,309.12/x
  3. Step 3: Cross multiply
    15,318.56x = 21,147.64 × 10,309.12
  4. Step 4: Simplify right side
    15,318.56x = 218,013,558.48
  5. Step 5: Solve for x
    x = 218,013,558.48/15,318.56
  6. Step 6: Final answer
    x = 14,231.99

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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.