Home / 19,784.49-27,312.21-12,722.91

Finding the Fourth Proportional to 19,784.49, 27,312.21 and 12,722.91

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Solution

The fourth proportional to 19,784.49, 27,312.21 and 12,722.91 is: 17,563.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,784.49 : 27,312.21 = 12,722.91 : x
  2. Step 2: Convert to fraction form
    19,784.49/27,312.21 = 12,722.91/x
  3. Step 3: Cross multiply
    19,784.49x = 27,312.21 × 12,722.91
  4. Step 4: Simplify right side
    19,784.49x = 347,490,789.73
  5. Step 5: Solve for x
    x = 347,490,789.73/19,784.49
  6. Step 6: Final answer
    x = 17,563.80

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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.