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Finding the Fourth Proportional to 55,928.80, 83,895.12 and 18,988

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Solution

The fourth proportional to 55,928.80, 83,895.12 and 18,988 is: 28,482.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,928.80 : 83,895.12 = 18,988 : x
  2. Step 2: Convert to fraction form
    55,928.80/83,895.12 = 18,988/x
  3. Step 3: Cross multiply
    55,928.80x = 83,895.12 × 18,988
  4. Step 4: Simplify right side
    55,928.80x = 1,593,000,538.56
  5. Step 5: Solve for x
    x = 1,593,000,538.56/55,928.80
  6. Step 6: Final answer
    x = 28,482.65

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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.