Home / 21,315.56-29,404.77-15,031.58

Finding the Fourth Proportional to 21,315.56, 29,404.77 and 15,031.58

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Solution

The fourth proportional to 21,315.56, 29,404.77 and 15,031.58 is: 20,736.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.56 : 29,404.77 = 15,031.58 : x
  2. Step 2: Convert to fraction form
    21,315.56/29,404.77 = 15,031.58/x
  3. Step 3: Cross multiply
    21,315.56x = 29,404.77 × 15,031.58
  4. Step 4: Simplify right side
    21,315.56x = 442,000,152.64
  5. Step 5: Solve for x
    x = 442,000,152.64/21,315.56
  6. Step 6: Final answer
    x = 20,736.03

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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.