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Finding the Fourth Proportional to 55,805.79, 83,708.82 and 13,686.06

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Solution

The fourth proportional to 55,805.79, 83,708.82 and 13,686.06 is: 20,529.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,805.79 : 83,708.82 = 13,686.06 : x
  2. Step 2: Convert to fraction form
    55,805.79/83,708.82 = 13,686.06/x
  3. Step 3: Cross multiply
    55,805.79x = 83,708.82 × 13,686.06
  4. Step 4: Simplify right side
    55,805.79x = 1,145,643,933.05
  5. Step 5: Solve for x
    x = 1,145,643,933.05/55,805.79
  6. Step 6: Final answer
    x = 20,529.12

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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.