Home / 21,341.28-29,448.12-12,388.68

Finding the Fourth Proportional to 21,341.28, 29,448.12 and 12,388.68

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Solution

The fourth proportional to 21,341.28, 29,448.12 and 12,388.68 is: 17,094.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,341.28 : 29,448.12 = 12,388.68 : x
  2. Step 2: Convert to fraction form
    21,341.28/29,448.12 = 12,388.68/x
  3. Step 3: Cross multiply
    21,341.28x = 29,448.12 × 12,388.68
  4. Step 4: Simplify right side
    21,341.28x = 364,823,335.28
  5. Step 5: Solve for x
    x = 364,823,335.28/21,341.28
  6. Step 6: Final answer
    x = 17,094.73

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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.