Home / 21,678.28-32,516.96-9,991.49

Finding the Fourth Proportional to 21,678.28, 32,516.96 and 9,991.49

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Solution

The fourth proportional to 21,678.28, 32,516.96 and 9,991.49 is: 14,987.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.28 : 32,516.96 = 9,991.49 : x
  2. Step 2: Convert to fraction form
    21,678.28/32,516.96 = 9,991.49/x
  3. Step 3: Cross multiply
    21,678.28x = 32,516.96 × 9,991.49
  4. Step 4: Simplify right side
    21,678.28x = 324,892,830.71
  5. Step 5: Solve for x
    x = 324,892,830.71/21,678.28
  6. Step 6: Final answer
    x = 14,987.02

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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.