Home / 27,990.16-38,626.68-15,415

Finding the Fourth Proportional to 27,990.16, 38,626.68 and 15,415

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Solution

The fourth proportional to 27,990.16, 38,626.68 and 15,415 is: 21,272.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,990.16 : 38,626.68 = 15,415 : x
  2. Step 2: Convert to fraction form
    27,990.16/38,626.68 = 15,415/x
  3. Step 3: Cross multiply
    27,990.16x = 38,626.68 × 15,415
  4. Step 4: Simplify right side
    27,990.16x = 595,430,272.20
  5. Step 5: Solve for x
    x = 595,430,272.20/27,990.16
  6. Step 6: Final answer
    x = 21,272.84

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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.