Home / 15,830.84-21,831.63-11,806.56

Finding the Fourth Proportional to 15,830.84, 21,831.63 and 11,806.56

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Solution

The fourth proportional to 15,830.84, 21,831.63 and 11,806.56 is: 16,281.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,830.84 : 21,831.63 = 11,806.56 : x
  2. Step 2: Convert to fraction form
    15,830.84/21,831.63 = 11,806.56/x
  3. Step 3: Cross multiply
    15,830.84x = 21,831.63 × 11,806.56
  4. Step 4: Simplify right side
    15,830.84x = 257,756,405.22
  5. Step 5: Solve for x
    x = 257,756,405.22/15,830.84
  6. Step 6: Final answer
    x = 16,281.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.