Home / 21,277.28-31,905.23-12,395.54

Finding the Fourth Proportional to 21,277.28, 31,905.23 and 12,395.54

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Solution

The fourth proportional to 21,277.28, 31,905.23 and 12,395.54 is: 18,587.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.28 : 31,905.23 = 12,395.54 : x
  2. Step 2: Convert to fraction form
    21,277.28/31,905.23 = 12,395.54/x
  3. Step 3: Cross multiply
    21,277.28x = 31,905.23 × 12,395.54
  4. Step 4: Simplify right side
    21,277.28x = 395,482,333.17
  5. Step 5: Solve for x
    x = 395,482,333.17/21,277.28
  6. Step 6: Final answer
    x = 18,587.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.