Home / 27,686.45-38,207.21-15,111.20

Finding the Fourth Proportional to 27,686.45, 38,207.21 and 15,111.20

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Solution

The fourth proportional to 27,686.45, 38,207.21 and 15,111.20 is: 20,853.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,686.45 : 38,207.21 = 15,111.20 : x
  2. Step 2: Convert to fraction form
    27,686.45/38,207.21 = 15,111.20/x
  3. Step 3: Cross multiply
    27,686.45x = 38,207.21 × 15,111.20
  4. Step 4: Simplify right side
    27,686.45x = 577,356,525.16
  5. Step 5: Solve for x
    x = 577,356,525.16/27,686.45
  6. Step 6: Final answer
    x = 20,853.40

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Half scale
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Double scale
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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.