Home / 28,374.72-39,191.50-20,810.14

Finding the Fourth Proportional to 28,374.72, 39,191.50 and 20,810.14

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Solution

The fourth proportional to 28,374.72, 39,191.50 and 20,810.14 is: 28,743.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,374.72 : 39,191.50 = 20,810.14 : x
  2. Step 2: Convert to fraction form
    28,374.72/39,191.50 = 20,810.14/x
  3. Step 3: Cross multiply
    28,374.72x = 39,191.50 × 20,810.14
  4. Step 4: Simplify right side
    28,374.72x = 815,580,601.81
  5. Step 5: Solve for x
    x = 815,580,601.81/28,374.72
  6. Step 6: Final answer
    x = 28,743.21

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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.