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Finding the Fourth Proportional to 19,700.48, 27,179.80 and 12,630.80

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Solution

The fourth proportional to 19,700.48, 27,179.80 and 12,630.80 is: 17,426.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,700.48 : 27,179.80 = 12,630.80 : x
  2. Step 2: Convert to fraction form
    19,700.48/27,179.80 = 12,630.80/x
  3. Step 3: Cross multiply
    19,700.48x = 27,179.80 × 12,630.80
  4. Step 4: Simplify right side
    19,700.48x = 343,302,617.84
  5. Step 5: Solve for x
    x = 343,302,617.84/19,700.48
  6. Step 6: Final answer
    x = 17,426.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.