Home / 12,809.20-19,217.40-5,417.20

Finding the Fourth Proportional to 12,809.20, 19,217.40 and 5,417.20

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Solution

The fourth proportional to 12,809.20, 19,217.40 and 5,417.20 is: 8,127.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.20 : 19,217.40 = 5,417.20 : x
  2. Step 2: Convert to fraction form
    12,809.20/19,217.40 = 5,417.20/x
  3. Step 3: Cross multiply
    12,809.20x = 19,217.40 × 5,417.20
  4. Step 4: Simplify right side
    12,809.20x = 104,104,499.28
  5. Step 5: Solve for x
    x = 104,104,499.28/12,809.20
  6. Step 6: Final answer
    x = 8,127.32

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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.