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Finding the Fourth Proportional to 15,189.84, 20,950.11 and 13,490.06

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Solution

The fourth proportional to 15,189.84, 20,950.11 and 13,490.06 is: 18,605.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189.84 : 20,950.11 = 13,490.06 : x
  2. Step 2: Convert to fraction form
    15,189.84/20,950.11 = 13,490.06/x
  3. Step 3: Cross multiply
    15,189.84x = 20,950.11 × 13,490.06
  4. Step 4: Simplify right side
    15,189.84x = 282,618,136.16
  5. Step 5: Solve for x
    x = 282,618,136.16/15,189.84
  6. Step 6: Final answer
    x = 18,605.73

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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.