Home / 19,721.61-27,215.76-12,648

Finding the Fourth Proportional to 19,721.61, 27,215.76 and 12,648

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Solution

The fourth proportional to 19,721.61, 27,215.76 and 12,648 is: 17,454.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,721.61 : 27,215.76 = 12,648 : x
  2. Step 2: Convert to fraction form
    19,721.61/27,215.76 = 12,648/x
  3. Step 3: Cross multiply
    19,721.61x = 27,215.76 × 12,648
  4. Step 4: Simplify right side
    19,721.61x = 344,224,932.48
  5. Step 5: Solve for x
    x = 344,224,932.48/19,721.61
  6. Step 6: Final answer
    x = 17,454.20

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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.