Home / 7,720.48-11,580.76-1,877.12

Finding the Fourth Proportional to 7,720.48, 11,580.76 and 1,877.12

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Solution

The fourth proportional to 7,720.48, 11,580.76 and 1,877.12 is: 2,815.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.48 : 11,580.76 = 1,877.12 : x
  2. Step 2: Convert to fraction form
    7,720.48/11,580.76 = 1,877.12/x
  3. Step 3: Cross multiply
    7,720.48x = 11,580.76 × 1,877.12
  4. Step 4: Simplify right side
    7,720.48x = 21,738,476.21
  5. Step 5: Solve for x
    x = 21,738,476.21/7,720.48
  6. Step 6: Final answer
    x = 2,815.69

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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.