Home / 21,203.49-29,264.59-15,852.78

Finding the Fourth Proportional to 21,203.49, 29,264.59 and 15,852.78

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Solution

The fourth proportional to 21,203.49, 29,264.59 and 15,852.78 is: 21,879.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.49 : 29,264.59 = 15,852.78 : x
  2. Step 2: Convert to fraction form
    21,203.49/29,264.59 = 15,852.78/x
  3. Step 3: Cross multiply
    21,203.49x = 29,264.59 × 15,852.78
  4. Step 4: Simplify right side
    21,203.49x = 463,925,126.88
  5. Step 5: Solve for x
    x = 463,925,126.88/21,203.49
  6. Step 6: Final answer
    x = 21,879.65

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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.