Home / 21,020.07-31,549.55-10,639.11

Finding the Fourth Proportional to 21,020.07, 31,549.55 and 10,639.11

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Solution

The fourth proportional to 21,020.07, 31,549.55 and 10,639.11 is: 15,968.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.07 : 31,549.55 = 10,639.11 : x
  2. Step 2: Convert to fraction form
    21,020.07/31,549.55 = 10,639.11/x
  3. Step 3: Cross multiply
    21,020.07x = 31,549.55 × 10,639.11
  4. Step 4: Simplify right side
    21,020.07x = 335,659,079.70
  5. Step 5: Solve for x
    x = 335,659,079.70/21,020.07
  6. Step 6: Final answer
    x = 15,968.50

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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.