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Finding the Fourth Proportional to 20,545.40, 30,774.90 and 17,089.40

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Solution

The fourth proportional to 20,545.40, 30,774.90 and 17,089.40 is: 25,598.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,545.40 : 30,774.90 = 17,089.40 : x
  2. Step 2: Convert to fraction form
    20,545.40/30,774.90 = 17,089.40/x
  3. Step 3: Cross multiply
    20,545.40x = 30,774.90 × 17,089.40
  4. Step 4: Simplify right side
    20,545.40x = 525,924,576.06
  5. Step 5: Solve for x
    x = 525,924,576.06/20,545.40
  6. Step 6: Final answer
    x = 25,598.17

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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.