Home / 19,131.80-28,699.36-5,280.80

Finding the Fourth Proportional to 19,131.80, 28,699.36 and 5,280.80

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Solution

The fourth proportional to 19,131.80, 28,699.36 and 5,280.80 is: 7,921.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,131.80 : 28,699.36 = 5,280.80 : x
  2. Step 2: Convert to fraction form
    19,131.80/28,699.36 = 5,280.80/x
  3. Step 3: Cross multiply
    19,131.80x = 28,699.36 × 5,280.80
  4. Step 4: Simplify right side
    19,131.80x = 151,555,580.29
  5. Step 5: Solve for x
    x = 151,555,580.29/19,131.80
  6. Step 6: Final answer
    x = 7,921.66

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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.