Home / 21,366.40-29,487.36-12,979.84

Finding the Fourth Proportional to 21,366.40, 29,487.36 and 12,979.84

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Solution

The fourth proportional to 21,366.40, 29,487.36 and 12,979.84 is: 17,913.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,366.40 : 29,487.36 = 12,979.84 : x
  2. Step 2: Convert to fraction form
    21,366.40/29,487.36 = 12,979.84/x
  3. Step 3: Cross multiply
    21,366.40x = 29,487.36 × 12,979.84
  4. Step 4: Simplify right side
    21,366.40x = 382,741,214.82
  5. Step 5: Solve for x
    x = 382,741,214.82/21,366.40
  6. Step 6: Final answer
    x = 17,913.23

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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.