Home / 19,170.02-28,751.70-5,315.78

Finding the Fourth Proportional to 19,170.02, 28,751.70 and 5,315.78

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Solution

The fourth proportional to 19,170.02, 28,751.70 and 5,315.78 is: 7,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,170.02 : 28,751.70 = 5,315.78 : x
  2. Step 2: Convert to fraction form
    19,170.02/28,751.70 = 5,315.78/x
  3. Step 3: Cross multiply
    19,170.02x = 28,751.70 × 5,315.78
  4. Step 4: Simplify right side
    19,170.02x = 152,837,711.83
  5. Step 5: Solve for x
    x = 152,837,711.83/19,170.02
  6. Step 6: Final answer
    x = 7,972.75

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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.