Home / 15,429-21,291.30-8,713.80

Finding the Fourth Proportional to 15,429, 21,291.30 and 8,713.80

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Solution

The fourth proportional to 15,429, 21,291.30 and 8,713.80 is: 12,024.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,429 : 21,291.30 = 8,713.80 : x
  2. Step 2: Convert to fraction form
    15,429/21,291.30 = 8,713.80/x
  3. Step 3: Cross multiply
    15,429x = 21,291.30 × 8,713.80
  4. Step 4: Simplify right side
    15,429x = 185,528,129.94
  5. Step 5: Solve for x
    x = 185,528,129.94/15,429
  6. Step 6: Final answer
    x = 12,024.64

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.