Home / 27,820.64-38,396.16-15,881.28

Finding the Fourth Proportional to 27,820.64, 38,396.16 and 15,881.28

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Solution

The fourth proportional to 27,820.64, 38,396.16 and 15,881.28 is: 21,918.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,820.64 : 38,396.16 = 15,881.28 : x
  2. Step 2: Convert to fraction form
    27,820.64/38,396.16 = 15,881.28/x
  3. Step 3: Cross multiply
    27,820.64x = 38,396.16 × 15,881.28
  4. Step 4: Simplify right side
    27,820.64x = 609,780,167.88
  5. Step 5: Solve for x
    x = 609,780,167.88/27,820.64
  6. Step 6: Final answer
    x = 21,918.27

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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.