Home / 19,139.84-28,711.40-5,288.80

Finding the Fourth Proportional to 19,139.84, 28,711.40 and 5,288.80

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Solution

The fourth proportional to 19,139.84, 28,711.40 and 5,288.80 is: 7,933.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,139.84 : 28,711.40 = 5,288.80 : x
  2. Step 2: Convert to fraction form
    19,139.84/28,711.40 = 5,288.80/x
  3. Step 3: Cross multiply
    19,139.84x = 28,711.40 × 5,288.80
  4. Step 4: Simplify right side
    19,139.84x = 151,848,852.32
  5. Step 5: Solve for x
    x = 151,848,852.32/19,139.84
  6. Step 6: Final answer
    x = 7,933.65

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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.