Home / 39,779.90-54,896.09-21,875.87

Finding the Fourth Proportional to 39,779.90, 54,896.09 and 21,875.87

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Solution

The fourth proportional to 39,779.90, 54,896.09 and 21,875.87 is: 30,188.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,779.90 : 54,896.09 = 21,875.87 : x
  2. Step 2: Convert to fraction form
    39,779.90/54,896.09 = 21,875.87/x
  3. Step 3: Cross multiply
    39,779.90x = 54,896.09 × 21,875.87
  4. Step 4: Simplify right side
    39,779.90x = 1,200,899,344.49
  5. Step 5: Solve for x
    x = 1,200,899,344.49/39,779.90
  6. Step 6: Final answer
    x = 30,188.60

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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.