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Finding the Fourth Proportional to 19,980.48, 29,984.08 and 8,293.68

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Solution

The fourth proportional to 19,980.48, 29,984.08 and 8,293.68 is: 12,446.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,980.48 : 29,984.08 = 8,293.68 : x
  2. Step 2: Convert to fraction form
    19,980.48/29,984.08 = 8,293.68/x
  3. Step 3: Cross multiply
    19,980.48x = 29,984.08 × 8,293.68
  4. Step 4: Simplify right side
    19,980.48x = 248,678,364.61
  5. Step 5: Solve for x
    x = 248,678,364.61/19,980.48
  6. Step 6: Final answer
    x = 12,446.07

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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.