Home / 15,438.90-21,305.70-8,365.26

Finding the Fourth Proportional to 15,438.90, 21,305.70 and 8,365.26

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Solution

The fourth proportional to 15,438.90, 21,305.70 and 8,365.26 is: 11,544.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.90 : 21,305.70 = 8,365.26 : x
  2. Step 2: Convert to fraction form
    15,438.90/21,305.70 = 8,365.26/x
  3. Step 3: Cross multiply
    15,438.90x = 21,305.70 × 8,365.26
  4. Step 4: Simplify right side
    15,438.90x = 178,227,719.98
  5. Step 5: Solve for x
    x = 178,227,719.98/15,438.90
  6. Step 6: Final answer
    x = 11,544.07

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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.