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Finding the Fourth Proportional to 21,661.65, 32,492.61 and 6,870.60

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Solution

The fourth proportional to 21,661.65, 32,492.61 and 6,870.60 is: 10,305.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.65 : 32,492.61 = 6,870.60 : x
  2. Step 2: Convert to fraction form
    21,661.65/32,492.61 = 6,870.60/x
  3. Step 3: Cross multiply
    21,661.65x = 32,492.61 × 6,870.60
  4. Step 4: Simplify right side
    21,661.65x = 223,243,726.27
  5. Step 5: Solve for x
    x = 223,243,726.27/21,661.65
  6. Step 6: Final answer
    x = 10,305.94

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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.