Home / 21,475.38-29,636.28-11,915.45

Finding the Fourth Proportional to 21,475.38, 29,636.28 and 11,915.45

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Solution

The fourth proportional to 21,475.38, 29,636.28 and 11,915.45 is: 16,443.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,475.38 : 29,636.28 = 11,915.45 : x
  2. Step 2: Convert to fraction form
    21,475.38/29,636.28 = 11,915.45/x
  3. Step 3: Cross multiply
    21,475.38x = 29,636.28 × 11,915.45
  4. Step 4: Simplify right side
    21,475.38x = 353,129,464.34
  5. Step 5: Solve for x
    x = 353,129,464.34/21,475.38
  6. Step 6: Final answer
    x = 16,443.46

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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.