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Finding the Fourth Proportional to 26,420.40, 39,619.07 and 9,992.88

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Solution

The fourth proportional to 26,420.40, 39,619.07 and 9,992.88 is: 14,984.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,420.40 : 39,619.07 = 9,992.88 : x
  2. Step 2: Convert to fraction form
    26,420.40/39,619.07 = 9,992.88/x
  3. Step 3: Cross multiply
    26,420.40x = 39,619.07 × 9,992.88
  4. Step 4: Simplify right side
    26,420.40x = 395,908,612.22
  5. Step 5: Solve for x
    x = 395,908,612.22/26,420.40
  6. Step 6: Final answer
    x = 14,984.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.