Home / 39,779.28-54,895.60-21,875.44

Finding the Fourth Proportional to 39,779.28, 54,895.60 and 21,875.44

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Solution

The fourth proportional to 39,779.28, 54,895.60 and 21,875.44 is: 30,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.28 : 54,895.60 = 21,875.44 : x
  2. Step 2: Convert to fraction form
    39,779.28/54,895.60 = 21,875.44/x
  3. Step 3: Cross multiply
    39,779.28x = 54,895.60 × 21,875.44
  4. Step 4: Simplify right side
    39,779.28x = 1,200,865,404.06
  5. Step 5: Solve for x
    x = 1,200,865,404.06/39,779.28
  6. Step 6: Final answer
    x = 30,188.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.