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Finding the Fourth Proportional to 18,891.52, 28,318.79 and 7,036.59

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Solution

The fourth proportional to 18,891.52, 28,318.79 and 7,036.59 is: 10,548.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,891.52 : 28,318.79 = 7,036.59 : x
  2. Step 2: Convert to fraction form
    18,891.52/28,318.79 = 7,036.59/x
  3. Step 3: Cross multiply
    18,891.52x = 28,318.79 × 7,036.59
  4. Step 4: Simplify right side
    18,891.52x = 199,267,714.53
  5. Step 5: Solve for x
    x = 199,267,714.53/18,891.52
  6. Step 6: Final answer
    x = 10,548.00

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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.