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Finding the Fourth Proportional to 27,812.70, 38,381.70 and 15,065.88

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Solution

The fourth proportional to 27,812.70, 38,381.70 and 15,065.88 is: 20,791.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,812.70 : 38,381.70 = 15,065.88 : x
  2. Step 2: Convert to fraction form
    27,812.70/38,381.70 = 15,065.88/x
  3. Step 3: Cross multiply
    27,812.70x = 38,381.70 × 15,065.88
  4. Step 4: Simplify right side
    27,812.70x = 578,254,142.89
  5. Step 5: Solve for x
    x = 578,254,142.89/27,812.70
  6. Step 6: Final answer
    x = 20,791.01

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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.