Home / 27,720.40-38,255.04-15,145.16

Finding the Fourth Proportional to 27,720.40, 38,255.04 and 15,145.16

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Solution

The fourth proportional to 27,720.40, 38,255.04 and 15,145.16 is: 20,900.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.40 : 38,255.04 = 15,145.16 : x
  2. Step 2: Convert to fraction form
    27,720.40/38,255.04 = 15,145.16/x
  3. Step 3: Cross multiply
    27,720.40x = 38,255.04 × 15,145.16
  4. Step 4: Simplify right side
    27,720.40x = 579,378,701.61
  5. Step 5: Solve for x
    x = 579,378,701.61/27,720.40
  6. Step 6: Final answer
    x = 20,900.81

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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.