Home / 13,831.17-19,088.76-7,781.72

Finding the Fourth Proportional to 13,831.17, 19,088.76 and 7,781.72

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Solution

The fourth proportional to 13,831.17, 19,088.76 and 7,781.72 is: 10,739.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.17 : 19,088.76 = 7,781.72 : x
  2. Step 2: Convert to fraction form
    13,831.17/19,088.76 = 7,781.72/x
  3. Step 3: Cross multiply
    13,831.17x = 19,088.76 × 7,781.72
  4. Step 4: Simplify right side
    13,831.17x = 148,543,290.02
  5. Step 5: Solve for x
    x = 148,543,290.02/13,831.17
  6. Step 6: Final answer
    x = 10,739.75

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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.