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Finding the Fourth Proportional to 55,339.60, 83,009.40 and 13,786.60

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Solution

The fourth proportional to 55,339.60, 83,009.40 and 13,786.60 is: 20,679.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,339.60 : 83,009.40 = 13,786.60 : x
  2. Step 2: Convert to fraction form
    55,339.60/83,009.40 = 13,786.60/x
  3. Step 3: Cross multiply
    55,339.60x = 83,009.40 × 13,786.60
  4. Step 4: Simplify right side
    55,339.60x = 1,144,417,394.04
  5. Step 5: Solve for x
    x = 1,144,417,394.04/55,339.60
  6. Step 6: Final answer
    x = 20,679.90

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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.