Home / 20,831.06-28,746.87-11,399.63

Finding the Fourth Proportional to 20,831.06, 28,746.87 and 11,399.63

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Solution

The fourth proportional to 20,831.06, 28,746.87 and 11,399.63 is: 15,731.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.06 : 28,746.87 = 11,399.63 : x
  2. Step 2: Convert to fraction form
    20,831.06/28,746.87 = 11,399.63/x
  3. Step 3: Cross multiply
    20,831.06x = 28,746.87 × 11,399.63
  4. Step 4: Simplify right side
    20,831.06x = 327,703,681.66
  5. Step 5: Solve for x
    x = 327,703,681.66/20,831.06
  6. Step 6: Final answer
    x = 15,731.49

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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.