Home / 21,031.68-29,022.66-12,078.48

Finding the Fourth Proportional to 21,031.68, 29,022.66 and 12,078.48

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Solution

The fourth proportional to 21,031.68, 29,022.66 and 12,078.48 is: 16,667.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.68 : 29,022.66 = 12,078.48 : x
  2. Step 2: Convert to fraction form
    21,031.68/29,022.66 = 12,078.48/x
  3. Step 3: Cross multiply
    21,031.68x = 29,022.66 × 12,078.48
  4. Step 4: Simplify right side
    21,031.68x = 350,549,618.36
  5. Step 5: Solve for x
    x = 350,549,618.36/21,031.68
  6. Step 6: Final answer
    x = 16,667.69

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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.