Home / 20,964.54-31,424.78-9,862.40

Finding the Fourth Proportional to 20,964.54, 31,424.78 and 9,862.40

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Solution

The fourth proportional to 20,964.54, 31,424.78 and 9,862.40 is: 14,783.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.54 : 31,424.78 = 9,862.40 : x
  2. Step 2: Convert to fraction form
    20,964.54/31,424.78 = 9,862.40/x
  3. Step 3: Cross multiply
    20,964.54x = 31,424.78 × 9,862.40
  4. Step 4: Simplify right side
    20,964.54x = 309,923,750.27
  5. Step 5: Solve for x
    x = 309,923,750.27/20,964.54
  6. Step 6: Final answer
    x = 14,783.24

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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.