Home / 27,856.89-38,443.11-15,281.64

Finding the Fourth Proportional to 27,856.89, 38,443.11 and 15,281.64

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Solution

The fourth proportional to 27,856.89, 38,443.11 and 15,281.64 is: 21,088.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,856.89 : 38,443.11 = 15,281.64 : x
  2. Step 2: Convert to fraction form
    27,856.89/38,443.11 = 15,281.64/x
  3. Step 3: Cross multiply
    27,856.89x = 38,443.11 × 15,281.64
  4. Step 4: Simplify right side
    27,856.89x = 587,473,767.50
  5. Step 5: Solve for x
    x = 587,473,767.50/27,856.89
  6. Step 6: Final answer
    x = 21,088.99

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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.