Home / 15,031.07-20,742.78-8,316.58

Finding the Fourth Proportional to 15,031.07, 20,742.78 and 8,316.58

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Solution

The fourth proportional to 15,031.07, 20,742.78 and 8,316.58 is: 11,476.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031.07 : 20,742.78 = 8,316.58 : x
  2. Step 2: Convert to fraction form
    15,031.07/20,742.78 = 8,316.58/x
  3. Step 3: Cross multiply
    15,031.07x = 20,742.78 × 8,316.58
  4. Step 4: Simplify right side
    15,031.07x = 172,508,885.58
  5. Step 5: Solve for x
    x = 172,508,885.58/15,031.07
  6. Step 6: Final answer
    x = 11,476.82

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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.