Home / 15,503.22-21,394.59-8,429.79

Finding the Fourth Proportional to 15,503.22, 21,394.59 and 8,429.79

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Solution

The fourth proportional to 15,503.22, 21,394.59 and 8,429.79 is: 11,633.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,503.22 : 21,394.59 = 8,429.79 : x
  2. Step 2: Convert to fraction form
    15,503.22/21,394.59 = 8,429.79/x
  3. Step 3: Cross multiply
    15,503.22x = 21,394.59 × 8,429.79
  4. Step 4: Simplify right side
    15,503.22x = 180,351,900.84
  5. Step 5: Solve for x
    x = 180,351,900.84/15,503.22
  6. Step 6: Final answer
    x = 11,633.19

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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.