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Finding the Fourth Proportional to 21,597.39, 32,412.33 and 9,918.81

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Solution

The fourth proportional to 21,597.39, 32,412.33 and 9,918.81 is: 14,885.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,597.39 : 32,412.33 = 9,918.81 : x
  2. Step 2: Convert to fraction form
    21,597.39/32,412.33 = 9,918.81/x
  3. Step 3: Cross multiply
    21,597.39x = 32,412.33 × 9,918.81
  4. Step 4: Simplify right side
    21,597.39x = 321,491,742.93
  5. Step 5: Solve for x
    x = 321,491,742.93/21,597.39
  6. Step 6: Final answer
    x = 14,885.68

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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.