Home / 21,004.28-31,502.08-9,906.20

Finding the Fourth Proportional to 21,004.28, 31,502.08 and 9,906.20

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Solution

The fourth proportional to 21,004.28, 31,502.08 and 9,906.20 is: 14,857.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.28 : 31,502.08 = 9,906.20 : x
  2. Step 2: Convert to fraction form
    21,004.28/31,502.08 = 9,906.20/x
  3. Step 3: Cross multiply
    21,004.28x = 31,502.08 × 9,906.20
  4. Step 4: Simplify right side
    21,004.28x = 312,065,904.90
  5. Step 5: Solve for x
    x = 312,065,904.90/21,004.28
  6. Step 6: Final answer
    x = 14,857.25

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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.