Home / 39,697.72-54,779.40-21,792.70

Finding the Fourth Proportional to 39,697.72, 54,779.40 and 21,792.70

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Solution

The fourth proportional to 39,697.72, 54,779.40 and 21,792.70 is: 30,072.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,697.72 : 54,779.40 = 21,792.70 : x
  2. Step 2: Convert to fraction form
    39,697.72/54,779.40 = 21,792.70/x
  3. Step 3: Cross multiply
    39,697.72x = 54,779.40 × 21,792.70
  4. Step 4: Simplify right side
    39,697.72x = 1,193,791,030.38
  5. Step 5: Solve for x
    x = 1,193,791,030.38/39,697.72
  6. Step 6: Final answer
    x = 30,072.03

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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.