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Finding the Fourth Proportional to 21,918.72, 32,855.04 and 11,527.68

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Solution

The fourth proportional to 21,918.72, 32,855.04 and 11,527.68 is: 17,279.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.72 : 32,855.04 = 11,527.68 : x
  2. Step 2: Convert to fraction form
    21,918.72/32,855.04 = 11,527.68/x
  3. Step 3: Cross multiply
    21,918.72x = 32,855.04 × 11,527.68
  4. Step 4: Simplify right side
    21,918.72x = 378,742,387.51
  5. Step 5: Solve for x
    x = 378,742,387.51/21,918.72
  6. Step 6: Final answer
    x = 17,279.40

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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.