Home / 20,478.89-28,259.55-11,526.64

Finding the Fourth Proportional to 20,478.89, 28,259.55 and 11,526.64

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Solution

The fourth proportional to 20,478.89, 28,259.55 and 11,526.64 is: 15,906.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.89 : 28,259.55 = 11,526.64 : x
  2. Step 2: Convert to fraction form
    20,478.89/28,259.55 = 11,526.64/x
  3. Step 3: Cross multiply
    20,478.89x = 28,259.55 × 11,526.64
  4. Step 4: Simplify right side
    20,478.89x = 325,737,588.76
  5. Step 5: Solve for x
    x = 325,737,588.76/20,478.89
  6. Step 6: Final answer
    x = 15,906.02

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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.