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Finding the Fourth Proportional to 20,266.65, 28,307.70 and 20,266.65

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Solution

The fourth proportional to 20,266.65, 28,307.70 and 20,266.65 is: 28,307.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.65 : 28,307.70 = 20,266.65 : x
  2. Step 2: Convert to fraction form
    20,266.65/28,307.70 = 20,266.65/x
  3. Step 3: Cross multiply
    20,266.65x = 28,307.70 × 20,266.65
  4. Step 4: Simplify right side
    20,266.65x = 573,702,248.21
  5. Step 5: Solve for x
    x = 573,702,248.21/20,266.65
  6. Step 6: Final answer
    x = 28,307.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.