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Finding the Fourth Proportional to 28,145.07, 38,831.40 and 16,967.07

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Solution

The fourth proportional to 28,145.07, 38,831.40 and 16,967.07 is: 23,409.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,145.07 : 38,831.40 = 16,967.07 : x
  2. Step 2: Convert to fraction form
    28,145.07/38,831.40 = 16,967.07/x
  3. Step 3: Cross multiply
    28,145.07x = 38,831.40 × 16,967.07
  4. Step 4: Simplify right side
    28,145.07x = 658,855,082.00
  5. Step 5: Solve for x
    x = 658,855,082.00/28,145.07
  6. Step 6: Final answer
    x = 23,409.25

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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.