Home / 15,503.64-21,394.56-8,429.88

Finding the Fourth Proportional to 15,503.64, 21,394.56 and 8,429.88

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Solution

The fourth proportional to 15,503.64, 21,394.56 and 8,429.88 is: 11,632.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.64 : 21,394.56 = 8,429.88 : x
  2. Step 2: Convert to fraction form
    15,503.64/21,394.56 = 8,429.88/x
  3. Step 3: Cross multiply
    15,503.64x = 21,394.56 × 8,429.88
  4. Step 4: Simplify right side
    15,503.64x = 180,353,573.45
  5. Step 5: Solve for x
    x = 180,353,573.45/15,503.64
  6. Step 6: Final answer
    x = 11,632.98

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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.