Home / 19,987.64-27,579.49-11,487.77

Finding the Fourth Proportional to 19,987.64, 27,579.49 and 11,487.77

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Solution

The fourth proportional to 19,987.64, 27,579.49 and 11,487.77 is: 15,851.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.64 : 27,579.49 = 11,487.77 : x
  2. Step 2: Convert to fraction form
    19,987.64/27,579.49 = 11,487.77/x
  3. Step 3: Cross multiply
    19,987.64x = 27,579.49 × 11,487.77
  4. Step 4: Simplify right side
    19,987.64x = 316,826,837.84
  5. Step 5: Solve for x
    x = 316,826,837.84/19,987.64
  6. Step 6: Final answer
    x = 15,851.14

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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.