Home / 21,918.28-30,246.61-12,358.08

Finding the Fourth Proportional to 21,918.28, 30,246.61 and 12,358.08

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Solution

The fourth proportional to 21,918.28, 30,246.61 and 12,358.08 is: 17,053.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,918.28 : 30,246.61 = 12,358.08 : x
  2. Step 2: Convert to fraction form
    21,918.28/30,246.61 = 12,358.08/x
  3. Step 3: Cross multiply
    21,918.28x = 30,246.61 × 12,358.08
  4. Step 4: Simplify right side
    21,918.28x = 373,789,874.88
  5. Step 5: Solve for x
    x = 373,789,874.88/21,918.28
  6. Step 6: Final answer
    x = 17,053.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.