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Finding the Fourth Proportional to 26,761, 36,921.90 and 15,429.06

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Solution

The fourth proportional to 26,761, 36,921.90 and 15,429.06 is: 21,287.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,761 : 36,921.90 = 15,429.06 : x
  2. Step 2: Convert to fraction form
    26,761/36,921.90 = 15,429.06/x
  3. Step 3: Cross multiply
    26,761x = 36,921.90 × 15,429.06
  4. Step 4: Simplify right side
    26,761x = 569,670,210.41
  5. Step 5: Solve for x
    x = 569,670,210.41/26,761
  6. Step 6: Final answer
    x = 21,287.33

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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.