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Finding the Fourth Proportional to 18,673.32, 28,008.99 and 6,985.65

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Solution

The fourth proportional to 18,673.32, 28,008.99 and 6,985.65 is: 10,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,673.32 : 28,008.99 = 6,985.65 : x
  2. Step 2: Convert to fraction form
    18,673.32/28,008.99 = 6,985.65/x
  3. Step 3: Cross multiply
    18,673.32x = 28,008.99 × 6,985.65
  4. Step 4: Simplify right side
    18,673.32x = 195,661,000.99
  5. Step 5: Solve for x
    x = 195,661,000.99/18,673.32
  6. Step 6: Final answer
    x = 10,478.10

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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.