Home / 15,318.95-21,136.43-8,941.89

Finding the Fourth Proportional to 15,318.95, 21,136.43 and 8,941.89

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Solution

The fourth proportional to 15,318.95, 21,136.43 and 8,941.89 is: 12,337.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,318.95 : 21,136.43 = 8,941.89 : x
  2. Step 2: Convert to fraction form
    15,318.95/21,136.43 = 8,941.89/x
  3. Step 3: Cross multiply
    15,318.95x = 21,136.43 × 8,941.89
  4. Step 4: Simplify right side
    15,318.95x = 188,999,654.41
  5. Step 5: Solve for x
    x = 188,999,654.41/15,318.95
  6. Step 6: Final answer
    x = 12,337.64

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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.