Home / 18,991.28-28,488.54-4,953.17

Finding the Fourth Proportional to 18,991.28, 28,488.54 and 4,953.17

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Solution

The fourth proportional to 18,991.28, 28,488.54 and 4,953.17 is: 7,430.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.28 : 28,488.54 = 4,953.17 : x
  2. Step 2: Convert to fraction form
    18,991.28/28,488.54 = 4,953.17/x
  3. Step 3: Cross multiply
    18,991.28x = 28,488.54 × 4,953.17
  4. Step 4: Simplify right side
    18,991.28x = 141,108,439.23
  5. Step 5: Solve for x
    x = 141,108,439.23/18,991.28
  6. Step 6: Final answer
    x = 7,430.17

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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.