Home / 15,390.96-21,238.24-8,678.24

Finding the Fourth Proportional to 15,390.96, 21,238.24 and 8,678.24

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Solution

The fourth proportional to 15,390.96, 21,238.24 and 8,678.24 is: 11,975.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,390.96 : 21,238.24 = 8,678.24 : x
  2. Step 2: Convert to fraction form
    15,390.96/21,238.24 = 8,678.24/x
  3. Step 3: Cross multiply
    15,390.96x = 21,238.24 × 8,678.24
  4. Step 4: Simplify right side
    15,390.96x = 184,310,543.90
  5. Step 5: Solve for x
    x = 184,310,543.90/15,390.96
  6. Step 6: Final answer
    x = 11,975.25

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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.