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Finding the Fourth Proportional to 18,681.72, 28,031.08 and 6,995.84

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Solution

The fourth proportional to 18,681.72, 28,031.08 and 6,995.84 is: 10,496.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.72 : 28,031.08 = 6,995.84 : x
  2. Step 2: Convert to fraction form
    18,681.72/28,031.08 = 6,995.84/x
  3. Step 3: Cross multiply
    18,681.72x = 28,031.08 × 6,995.84
  4. Step 4: Simplify right side
    18,681.72x = 196,100,950.71
  5. Step 5: Solve for x
    x = 196,100,950.71/18,681.72
  6. Step 6: Final answer
    x = 10,496.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.