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Finding the Fourth Proportional to 18,768.65, 25,900.74 and 11,695.10

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Solution

The fourth proportional to 18,768.65, 25,900.74 and 11,695.10 is: 16,139.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,768.65 : 25,900.74 = 11,695.10 : x
  2. Step 2: Convert to fraction form
    18,768.65/25,900.74 = 11,695.10/x
  3. Step 3: Cross multiply
    18,768.65x = 25,900.74 × 11,695.10
  4. Step 4: Simplify right side
    18,768.65x = 302,911,614.87
  5. Step 5: Solve for x
    x = 302,911,614.87/18,768.65
  6. Step 6: Final answer
    x = 16,139.24

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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.