Home / 20,551.96-28,364.40-15,261.88

Finding the Fourth Proportional to 20,551.96, 28,364.40 and 15,261.88

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Solution

The fourth proportional to 20,551.96, 28,364.40 and 15,261.88 is: 21,063.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.96 : 28,364.40 = 15,261.88 : x
  2. Step 2: Convert to fraction form
    20,551.96/28,364.40 = 15,261.88/x
  3. Step 3: Cross multiply
    20,551.96x = 28,364.40 × 15,261.88
  4. Step 4: Simplify right side
    20,551.96x = 432,894,069.07
  5. Step 5: Solve for x
    x = 432,894,069.07/20,551.96
  6. Step 6: Final answer
    x = 21,063.40

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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.