Home / 27,486.61-37,908.11-21,128.59

Finding the Fourth Proportional to 27,486.61, 37,908.11 and 21,128.59

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Solution

The fourth proportional to 27,486.61, 37,908.11 and 21,128.59 is: 29,139.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,486.61 : 37,908.11 = 21,128.59 : x
  2. Step 2: Convert to fraction form
    27,486.61/37,908.11 = 21,128.59/x
  3. Step 3: Cross multiply
    27,486.61x = 37,908.11 × 21,128.59
  4. Step 4: Simplify right side
    27,486.61x = 800,944,808.22
  5. Step 5: Solve for x
    x = 800,944,808.22/27,486.61
  6. Step 6: Final answer
    x = 29,139.45

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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.