Home / 21,218.00-31,831.56-6,428.07

Finding the Fourth Proportional to 21,218.00, 31,831.56 and 6,428.07

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Solution

The fourth proportional to 21,218.00, 31,831.56 and 6,428.07 is: 9,643.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.00 : 31,831.56 = 6,428.07 : x
  2. Step 2: Convert to fraction form
    21,218.00/31,831.56 = 6,428.07/x
  3. Step 3: Cross multiply
    21,218.00x = 31,831.56 × 6,428.07
  4. Step 4: Simplify right side
    21,218.00x = 204,615,522.57
  5. Step 5: Solve for x
    x = 204,615,522.57/21,218.00
  6. Step 6: Final answer
    x = 9,643.49

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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.