Home / 21,135.74-31,705.73-7,812.24

Finding the Fourth Proportional to 21,135.74, 31,705.73 and 7,812.24

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Solution

The fourth proportional to 21,135.74, 31,705.73 and 7,812.24 is: 11,719.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.74 : 31,705.73 = 7,812.24 : x
  2. Step 2: Convert to fraction form
    21,135.74/31,705.73 = 7,812.24/x
  3. Step 3: Cross multiply
    21,135.74x = 31,705.73 × 7,812.24
  4. Step 4: Simplify right side
    21,135.74x = 247,692,733.07
  5. Step 5: Solve for x
    x = 247,692,733.07/21,135.74
  6. Step 6: Final answer
    x = 11,719.14

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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.