Home / 21,288.97-29,378.79-12,341.66

Finding the Fourth Proportional to 21,288.97, 29,378.79 and 12,341.66

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Solution

The fourth proportional to 21,288.97, 29,378.79 and 12,341.66 is: 17,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.97 : 29,378.79 = 12,341.66 : x
  2. Step 2: Convert to fraction form
    21,288.97/29,378.79 = 12,341.66/x
  3. Step 3: Cross multiply
    21,288.97x = 29,378.79 × 12,341.66
  4. Step 4: Simplify right side
    21,288.97x = 362,583,152.34
  5. Step 5: Solve for x
    x = 362,583,152.34/21,288.97
  6. Step 6: Final answer
    x = 17,031.50

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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.