Home / 27,842.21-38,421.79-15,742.50

Finding the Fourth Proportional to 27,842.21, 38,421.79 and 15,742.50

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Solution

The fourth proportional to 27,842.21, 38,421.79 and 15,742.50 is: 21,724.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,842.21 : 38,421.79 = 15,742.50 : x
  2. Step 2: Convert to fraction form
    27,842.21/38,421.79 = 15,742.50/x
  3. Step 3: Cross multiply
    27,842.21x = 38,421.79 × 15,742.50
  4. Step 4: Simplify right side
    27,842.21x = 604,854,989.72
  5. Step 5: Solve for x
    x = 604,854,989.72/27,842.21
  6. Step 6: Final answer
    x = 21,724.39

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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.