Home / 21,084.90-31,603.01-7,928.88

Finding the Fourth Proportional to 21,084.90, 31,603.01 and 7,928.88

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Solution

The fourth proportional to 21,084.90, 31,603.01 and 7,928.88 is: 11,884.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.90 : 31,603.01 = 7,928.88 : x
  2. Step 2: Convert to fraction form
    21,084.90/31,603.01 = 7,928.88/x
  3. Step 3: Cross multiply
    21,084.90x = 31,603.01 × 7,928.88
  4. Step 4: Simplify right side
    21,084.90x = 250,576,434.28
  5. Step 5: Solve for x
    x = 250,576,434.28/21,084.90
  6. Step 6: Final answer
    x = 11,884.17

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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.