Home / 20,478.47-28,258.11-11,525.82

Finding the Fourth Proportional to 20,478.47, 28,258.11 and 11,525.82

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Solution

The fourth proportional to 20,478.47, 28,258.11 and 11,525.82 is: 15,904.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.47 : 28,258.11 = 11,525.82 : x
  2. Step 2: Convert to fraction form
    20,478.47/28,258.11 = 11,525.82/x
  3. Step 3: Cross multiply
    20,478.47x = 28,258.11 × 11,525.82
  4. Step 4: Simplify right side
    20,478.47x = 325,697,783.43
  5. Step 5: Solve for x
    x = 325,697,783.43/20,478.47
  6. Step 6: Final answer
    x = 15,904.40

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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.