Home / 15,347.78-21,181.81-8,633.69

Finding the Fourth Proportional to 15,347.78, 21,181.81 and 8,633.69

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Solution

The fourth proportional to 15,347.78, 21,181.81 and 8,633.69 is: 11,915.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,347.78 : 21,181.81 = 8,633.69 : x
  2. Step 2: Convert to fraction form
    15,347.78/21,181.81 = 8,633.69/x
  3. Step 3: Cross multiply
    15,347.78x = 21,181.81 × 8,633.69
  4. Step 4: Simplify right side
    15,347.78x = 182,877,181.18
  5. Step 5: Solve for x
    x = 182,877,181.18/15,347.78
  6. Step 6: Final answer
    x = 11,915.55

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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.