Home / 13,926.08-19,205.12-12,920.08

Finding the Fourth Proportional to 13,926.08, 19,205.12 and 12,920.08

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Solution

The fourth proportional to 13,926.08, 19,205.12 and 12,920.08 is: 17,817.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,926.08 : 19,205.12 = 12,920.08 : x
  2. Step 2: Convert to fraction form
    13,926.08/19,205.12 = 12,920.08/x
  3. Step 3: Cross multiply
    13,926.08x = 19,205.12 × 12,920.08
  4. Step 4: Simplify right side
    13,926.08x = 248,131,686.81
  5. Step 5: Solve for x
    x = 248,131,686.81/13,926.08
  6. Step 6: Final answer
    x = 17,817.77

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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.