Home / 27,999.12-38,638.78-15,423.87

Finding the Fourth Proportional to 27,999.12, 38,638.78 and 15,423.87

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Solution

The fourth proportional to 27,999.12, 38,638.78 and 15,423.87 is: 21,284.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.12 : 38,638.78 = 15,423.87 : x
  2. Step 2: Convert to fraction form
    27,999.12/38,638.78 = 15,423.87/x
  3. Step 3: Cross multiply
    27,999.12x = 38,638.78 × 15,423.87
  4. Step 4: Simplify right side
    27,999.12x = 595,959,615.23
  5. Step 5: Solve for x
    x = 595,959,615.23/27,999.12
  6. Step 6: Final answer
    x = 21,284.94

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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.