Home / 27,720.88-38,254.81-15,145.72

Finding the Fourth Proportional to 27,720.88, 38,254.81 and 15,145.72

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Solution

The fourth proportional to 27,720.88, 38,254.81 and 15,145.72 is: 20,901.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.88 : 38,254.81 = 15,145.72 : x
  2. Step 2: Convert to fraction form
    27,720.88/38,254.81 = 15,145.72/x
  3. Step 3: Cross multiply
    27,720.88x = 38,254.81 × 15,145.72
  4. Step 4: Simplify right side
    27,720.88x = 579,396,411.77
  5. Step 5: Solve for x
    x = 579,396,411.77/27,720.88
  6. Step 6: Final answer
    x = 20,901.09

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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.