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Finding the Fourth Proportional to 26,009.40, 38,999.70 and 8,470.20

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Solution

The fourth proportional to 26,009.40, 38,999.70 and 8,470.20 is: 12,700.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,009.40 : 38,999.70 = 8,470.20 : x
  2. Step 2: Convert to fraction form
    26,009.40/38,999.70 = 8,470.20/x
  3. Step 3: Cross multiply
    26,009.40x = 38,999.70 × 8,470.20
  4. Step 4: Simplify right side
    26,009.40x = 330,335,258.94
  5. Step 5: Solve for x
    x = 330,335,258.94/26,009.40
  6. Step 6: Final answer
    x = 12,700.61

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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.