Home / 27,987.07-38,621.77-15,240.12

Finding the Fourth Proportional to 27,987.07, 38,621.77 and 15,240.12

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Solution

The fourth proportional to 27,987.07, 38,621.77 and 15,240.12 is: 21,031.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,987.07 : 38,621.77 = 15,240.12 : x
  2. Step 2: Convert to fraction form
    27,987.07/38,621.77 = 15,240.12/x
  3. Step 3: Cross multiply
    27,987.07x = 38,621.77 × 15,240.12
  4. Step 4: Simplify right side
    27,987.07x = 588,600,659.51
  5. Step 5: Solve for x
    x = 588,600,659.51/27,987.07
  6. Step 6: Final answer
    x = 21,031.16

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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.