Home / 21,016.28-31,528.12-6,977.12

Finding the Fourth Proportional to 21,016.28, 31,528.12 and 6,977.12

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Solution

The fourth proportional to 21,016.28, 31,528.12 and 6,977.12 is: 10,466.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,016.28 : 31,528.12 = 6,977.12 : x
  2. Step 2: Convert to fraction form
    21,016.28/31,528.12 = 6,977.12/x
  3. Step 3: Cross multiply
    21,016.28x = 31,528.12 × 6,977.12
  4. Step 4: Simplify right side
    21,016.28x = 219,975,476.61
  5. Step 5: Solve for x
    x = 219,975,476.61/21,016.28
  6. Step 6: Final answer
    x = 10,466.91

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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.