Home / 21,010.28-31,511.08-9,912.20

Finding the Fourth Proportional to 21,010.28, 31,511.08 and 9,912.20

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Solution

The fourth proportional to 21,010.28, 31,511.08 and 9,912.20 is: 14,866.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,010.28 : 31,511.08 = 9,912.20 : x
  2. Step 2: Convert to fraction form
    21,010.28/31,511.08 = 9,912.20/x
  3. Step 3: Cross multiply
    21,010.28x = 31,511.08 × 9,912.20
  4. Step 4: Simplify right side
    21,010.28x = 312,344,127.18
  5. Step 5: Solve for x
    x = 312,344,127.18/21,010.28
  6. Step 6: Final answer
    x = 14,866.25

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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.