Home / 15,831.28-21,852.69-9,119.62

Finding the Fourth Proportional to 15,831.28, 21,852.69 and 9,119.62

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Solution

The fourth proportional to 15,831.28, 21,852.69 and 9,119.62 is: 12,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.28 : 21,852.69 = 9,119.62 : x
  2. Step 2: Convert to fraction form
    15,831.28/21,852.69 = 9,119.62/x
  3. Step 3: Cross multiply
    15,831.28x = 21,852.69 × 9,119.62
  4. Step 4: Simplify right side
    15,831.28x = 199,288,228.78
  5. Step 5: Solve for x
    x = 199,288,228.78/15,831.28
  6. Step 6: Final answer
    x = 12,588.26

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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.