Home / 27,720.90-38,253.65-15,145.70

Finding the Fourth Proportional to 27,720.90, 38,253.65 and 15,145.70

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Solution

The fourth proportional to 27,720.90, 38,253.65 and 15,145.70 is: 20,900.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.90 : 38,253.65 = 15,145.70 : x
  2. Step 2: Convert to fraction form
    27,720.90/38,253.65 = 15,145.70/x
  3. Step 3: Cross multiply
    27,720.90x = 38,253.65 × 15,145.70
  4. Step 4: Simplify right side
    27,720.90x = 579,378,306.81
  5. Step 5: Solve for x
    x = 579,378,306.81/27,720.90
  6. Step 6: Final answer
    x = 20,900.41

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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.