Home / 21,315.84-29,416.44-11,886.24

Finding the Fourth Proportional to 21,315.84, 29,416.44 and 11,886.24

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Solution

The fourth proportional to 21,315.84, 29,416.44 and 11,886.24 is: 16,403.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.84 : 29,416.44 = 11,886.24 : x
  2. Step 2: Convert to fraction form
    21,315.84/29,416.44 = 11,886.24/x
  3. Step 3: Cross multiply
    21,315.84x = 29,416.44 × 11,886.24
  4. Step 4: Simplify right side
    21,315.84x = 349,650,865.79
  5. Step 5: Solve for x
    x = 349,650,865.79/21,315.84
  6. Step 6: Final answer
    x = 16,403.34

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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.