Home / 20,877.78-31,294.80-9,775.52

Finding the Fourth Proportional to 20,877.78, 31,294.80 and 9,775.52

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Solution

The fourth proportional to 20,877.78, 31,294.80 and 9,775.52 is: 14,653.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.78 : 31,294.80 = 9,775.52 : x
  2. Step 2: Convert to fraction form
    20,877.78/31,294.80 = 9,775.52/x
  3. Step 3: Cross multiply
    20,877.78x = 31,294.80 × 9,775.52
  4. Step 4: Simplify right side
    20,877.78x = 305,922,943.30
  5. Step 5: Solve for x
    x = 305,922,943.30/20,877.78
  6. Step 6: Final answer
    x = 14,653.04

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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.