Home / 15,399.31-21,248.31-8,685.22

Finding the Fourth Proportional to 15,399.31, 21,248.31 and 8,685.22

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Solution

The fourth proportional to 15,399.31, 21,248.31 and 8,685.22 is: 11,984.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,399.31 : 21,248.31 = 8,685.22 : x
  2. Step 2: Convert to fraction form
    15,399.31/21,248.31 = 8,685.22/x
  3. Step 3: Cross multiply
    15,399.31x = 21,248.31 × 8,685.22
  4. Step 4: Simplify right side
    15,399.31x = 184,546,246.98
  5. Step 5: Solve for x
    x = 184,546,246.98/15,399.31
  6. Step 6: Final answer
    x = 11,984.06

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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.