Home / 12,889.40-19,320.60-5,397.24

Finding the Fourth Proportional to 12,889.40, 19,320.60 and 5,397.24

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Solution

The fourth proportional to 12,889.40, 19,320.60 and 5,397.24 is: 8,090.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,889.40 : 19,320.60 = 5,397.24 : x
  2. Step 2: Convert to fraction form
    12,889.40/19,320.60 = 5,397.24/x
  3. Step 3: Cross multiply
    12,889.40x = 19,320.60 × 5,397.24
  4. Step 4: Simplify right side
    12,889.40x = 104,277,915.14
  5. Step 5: Solve for x
    x = 104,277,915.14/12,889.40
  6. Step 6: Final answer
    x = 8,090.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.