Home / 15,503.28-21,393.62-8,429.64

Finding the Fourth Proportional to 15,503.28, 21,393.62 and 8,429.64

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Solution

The fourth proportional to 15,503.28, 21,393.62 and 8,429.64 is: 11,632.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.28 : 21,393.62 = 8,429.64 : x
  2. Step 2: Convert to fraction form
    15,503.28/21,393.62 = 8,429.64/x
  3. Step 3: Cross multiply
    15,503.28x = 21,393.62 × 8,429.64
  4. Step 4: Simplify right side
    15,503.28x = 180,340,514.90
  5. Step 5: Solve for x
    x = 180,340,514.90/15,503.28
  6. Step 6: Final answer
    x = 11,632.41

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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.