Home / 20,877.18-28,810.60-11,317.08

Finding the Fourth Proportional to 20,877.18, 28,810.60 and 11,317.08

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Solution

The fourth proportional to 20,877.18, 28,810.60 and 11,317.08 is: 15,617.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.18 : 28,810.60 = 11,317.08 : x
  2. Step 2: Convert to fraction form
    20,877.18/28,810.60 = 11,317.08/x
  3. Step 3: Cross multiply
    20,877.18x = 28,810.60 × 11,317.08
  4. Step 4: Simplify right side
    20,877.18x = 326,051,865.05
  5. Step 5: Solve for x
    x = 326,051,865.05/20,877.18
  6. Step 6: Final answer
    x = 15,617.62

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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.