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Finding the Fourth Proportional to 20,527.40, 30,747.90 and 17,071.40

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Solution

The fourth proportional to 20,527.40, 30,747.90 and 17,071.40 is: 25,571.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,527.40 : 30,747.90 = 17,071.40 : x
  2. Step 2: Convert to fraction form
    20,527.40/30,747.90 = 17,071.40/x
  3. Step 3: Cross multiply
    20,527.40x = 30,747.90 × 17,071.40
  4. Step 4: Simplify right side
    20,527.40x = 524,909,700.06
  5. Step 5: Solve for x
    x = 524,909,700.06/20,527.40
  6. Step 6: Final answer
    x = 25,571.17

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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.