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Finding the Fourth Proportional to 20,082, 27,726.16 and 12,915.14

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Solution

The fourth proportional to 20,082, 27,726.16 and 12,915.14 is: 17,831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,082 : 27,726.16 = 12,915.14 : x
  2. Step 2: Convert to fraction form
    20,082/27,726.16 = 12,915.14/x
  3. Step 3: Cross multiply
    20,082x = 27,726.16 × 12,915.14
  4. Step 4: Simplify right side
    20,082x = 358,087,238.06
  5. Step 5: Solve for x
    x = 358,087,238.06/20,082
  6. Step 6: Final answer
    x = 17,831.25

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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.