Home / 19,721.40-27,200.10-12,648.48

Finding the Fourth Proportional to 19,721.40, 27,200.10 and 12,648.48

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Solution

The fourth proportional to 19,721.40, 27,200.10 and 12,648.48 is: 17,445.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.40 : 27,200.10 = 12,648.48 : x
  2. Step 2: Convert to fraction form
    19,721.40/27,200.10 = 12,648.48/x
  3. Step 3: Cross multiply
    19,721.40x = 27,200.10 × 12,648.48
  4. Step 4: Simplify right side
    19,721.40x = 344,039,920.85
  5. Step 5: Solve for x
    x = 344,039,920.85/19,721.40
  6. Step 6: Final answer
    x = 17,445.00

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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.