Home / 12,881.36-19,312.92-6,638.68

Finding the Fourth Proportional to 12,881.36, 19,312.92 and 6,638.68

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Solution

The fourth proportional to 12,881.36, 19,312.92 and 6,638.68 is: 9,953.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.36 : 19,312.92 = 6,638.68 : x
  2. Step 2: Convert to fraction form
    12,881.36/19,312.92 = 6,638.68/x
  3. Step 3: Cross multiply
    12,881.36x = 19,312.92 × 6,638.68
  4. Step 4: Simplify right side
    12,881.36x = 128,212,295.75
  5. Step 5: Solve for x
    x = 128,212,295.75/12,881.36
  6. Step 6: Final answer
    x = 9,953.32

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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.