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Finding the Fourth Proportional to 18,831.16, 28,254.18 and 7,147.48

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Solution

The fourth proportional to 18,831.16, 28,254.18 and 7,147.48 is: 10,724.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.16 : 28,254.18 = 7,147.48 : x
  2. Step 2: Convert to fraction form
    18,831.16/28,254.18 = 7,147.48/x
  3. Step 3: Cross multiply
    18,831.16x = 28,254.18 × 7,147.48
  4. Step 4: Simplify right side
    18,831.16x = 201,946,186.47
  5. Step 5: Solve for x
    x = 201,946,186.47/18,831.16
  6. Step 6: Final answer
    x = 10,724.04

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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.