Home / 20,478.69-28,261.25-11,526.34

Finding the Fourth Proportional to 20,478.69, 28,261.25 and 11,526.34

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Solution

The fourth proportional to 20,478.69, 28,261.25 and 11,526.34 is: 15,906.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.69 : 28,261.25 = 11,526.34 : x
  2. Step 2: Convert to fraction form
    20,478.69/28,261.25 = 11,526.34/x
  3. Step 3: Cross multiply
    20,478.69x = 28,261.25 × 11,526.34
  4. Step 4: Simplify right side
    20,478.69x = 325,748,911.72
  5. Step 5: Solve for x
    x = 325,748,911.72/20,478.69
  6. Step 6: Final answer
    x = 15,906.72

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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.