Home / 21,479.84-29,628.54-15,520.26

Finding the Fourth Proportional to 21,479.84, 29,628.54 and 15,520.26

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Solution

The fourth proportional to 21,479.84, 29,628.54 and 15,520.26 is: 21,408.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,479.84 : 29,628.54 = 15,520.26 : x
  2. Step 2: Convert to fraction form
    21,479.84/29,628.54 = 15,520.26/x
  3. Step 3: Cross multiply
    21,479.84x = 29,628.54 × 15,520.26
  4. Step 4: Simplify right side
    21,479.84x = 459,842,644.22
  5. Step 5: Solve for x
    x = 459,842,644.22/21,479.84
  6. Step 6: Final answer
    x = 21,408.10

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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.