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Finding the Fourth Proportional to 21,368.60, 32,052.60 and 9,681.80

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Solution

The fourth proportional to 21,368.60, 32,052.60 and 9,681.80 is: 14,522.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,368.60 : 32,052.60 = 9,681.80 : x
  2. Step 2: Convert to fraction form
    21,368.60/32,052.60 = 9,681.80/x
  3. Step 3: Cross multiply
    21,368.60x = 32,052.60 × 9,681.80
  4. Step 4: Simplify right side
    21,368.60x = 310,326,862.68
  5. Step 5: Solve for x
    x = 310,326,862.68/21,368.60
  6. Step 6: Final answer
    x = 14,522.56

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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.