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Finding the Fourth Proportional to 12,260.79, 18,390.47 and 3,495.47

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Solution

The fourth proportional to 12,260.79, 18,390.47 and 3,495.47 is: 5,242.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,260.79 : 18,390.47 = 3,495.47 : x
  2. Step 2: Convert to fraction form
    12,260.79/18,390.47 = 3,495.47/x
  3. Step 3: Cross multiply
    12,260.79x = 18,390.47 × 3,495.47
  4. Step 4: Simplify right side
    12,260.79x = 64,283,226.74
  5. Step 5: Solve for x
    x = 64,283,226.74/12,260.79
  6. Step 6: Final answer
    x = 5,242.99

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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.