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Finding the Fourth Proportional to 15,386.99, 21,234.01 and 8,313.39

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Solution

The fourth proportional to 15,386.99, 21,234.01 and 8,313.39 is: 11,472.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.99 : 21,234.01 = 8,313.39 : x
  2. Step 2: Convert to fraction form
    15,386.99/21,234.01 = 8,313.39/x
  3. Step 3: Cross multiply
    15,386.99x = 21,234.01 × 8,313.39
  4. Step 4: Simplify right side
    15,386.99x = 176,526,606.39
  5. Step 5: Solve for x
    x = 176,526,606.39/15,386.99
  6. Step 6: Final answer
    x = 11,472.46

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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.