Home / 15,438.45-21,305.08-8,364.87

Finding the Fourth Proportional to 15,438.45, 21,305.08 and 8,364.87

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Solution

The fourth proportional to 15,438.45, 21,305.08 and 8,364.87 is: 11,543.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,438.45 : 21,305.08 = 8,364.87 : x
  2. Step 2: Convert to fraction form
    15,438.45/21,305.08 = 8,364.87/x
  3. Step 3: Cross multiply
    15,438.45x = 21,305.08 × 8,364.87
  4. Step 4: Simplify right side
    15,438.45x = 178,214,118.01
  5. Step 5: Solve for x
    x = 178,214,118.01/15,438.45
  6. Step 6: Final answer
    x = 11,543.52

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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.