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Finding the Fourth Proportional to 27,420.47, 41,130.71 and 9,890.30

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Solution

The fourth proportional to 27,420.47, 41,130.71 and 9,890.30 is: 14,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,420.47 : 41,130.71 = 9,890.30 : x
  2. Step 2: Convert to fraction form
    27,420.47/41,130.71 = 9,890.30/x
  3. Step 3: Cross multiply
    27,420.47x = 41,130.71 × 9,890.30
  4. Step 4: Simplify right side
    27,420.47x = 406,795,179.39
  5. Step 5: Solve for x
    x = 406,795,179.39/27,420.47
  6. Step 6: Final answer
    x = 14,835.45

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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.