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Finding the Fourth Proportional to 21,660.61, 32,492.07 and 6,870.71

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Solution

The fourth proportional to 21,660.61, 32,492.07 and 6,870.71 is: 10,306.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.61 : 32,492.07 = 6,870.71 : x
  2. Step 2: Convert to fraction form
    21,660.61/32,492.07 = 6,870.71/x
  3. Step 3: Cross multiply
    21,660.61x = 32,492.07 × 6,870.71
  4. Step 4: Simplify right side
    21,660.61x = 223,243,427.81
  5. Step 5: Solve for x
    x = 223,243,427.81/21,660.61
  6. Step 6: Final answer
    x = 10,306.43

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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.