Home / 12,900.12-19,368.13-6,664.74

Finding the Fourth Proportional to 12,900.12, 19,368.13 and 6,664.74

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Solution

The fourth proportional to 12,900.12, 19,368.13 and 6,664.74 is: 10,006.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.12 : 19,368.13 = 6,664.74 : x
  2. Step 2: Convert to fraction form
    12,900.12/19,368.13 = 6,664.74/x
  3. Step 3: Cross multiply
    12,900.12x = 19,368.13 × 6,664.74
  4. Step 4: Simplify right side
    12,900.12x = 129,083,550.74
  5. Step 5: Solve for x
    x = 129,083,550.74/12,900.12
  6. Step 6: Final answer
    x = 10,006.38

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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.