Home / 21,346.40-29,445.78-12,392.76

Finding the Fourth Proportional to 21,346.40, 29,445.78 and 12,392.76

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Solution

The fourth proportional to 21,346.40, 29,445.78 and 12,392.76 is: 17,094.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,346.40 : 29,445.78 = 12,392.76 : x
  2. Step 2: Convert to fraction form
    21,346.40/29,445.78 = 12,392.76/x
  3. Step 3: Cross multiply
    21,346.40x = 29,445.78 × 12,392.76
  4. Step 4: Simplify right side
    21,346.40x = 364,914,641.45
  5. Step 5: Solve for x
    x = 364,914,641.45/21,346.40
  6. Step 6: Final answer
    x = 17,094.90

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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.