Home / 20,928.18-28,888.47-13,856.88

Finding the Fourth Proportional to 20,928.18, 28,888.47 and 13,856.88

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Solution

The fourth proportional to 20,928.18, 28,888.47 and 13,856.88 is: 19,127.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.18 : 28,888.47 = 13,856.88 : x
  2. Step 2: Convert to fraction form
    20,928.18/28,888.47 = 13,856.88/x
  3. Step 3: Cross multiply
    20,928.18x = 28,888.47 × 13,856.88
  4. Step 4: Simplify right side
    20,928.18x = 400,304,062.17
  5. Step 5: Solve for x
    x = 400,304,062.17/20,928.18
  6. Step 6: Final answer
    x = 19,127.51

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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.