Home / 21,211.31-31,802.93-10,119.71

Finding the Fourth Proportional to 21,211.31, 31,802.93 and 10,119.71

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Solution

The fourth proportional to 21,211.31, 31,802.93 and 10,119.71 is: 15,172.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.31 : 31,802.93 = 10,119.71 : x
  2. Step 2: Convert to fraction form
    21,211.31/31,802.93 = 10,119.71/x
  3. Step 3: Cross multiply
    21,211.31x = 31,802.93 × 10,119.71
  4. Step 4: Simplify right side
    21,211.31x = 321,836,428.75
  5. Step 5: Solve for x
    x = 321,836,428.75/21,211.31
  6. Step 6: Final answer
    x = 15,172.87

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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.