Home / 20,970.16-28,950.76-13,906.12

Finding the Fourth Proportional to 20,970.16, 28,950.76 and 13,906.12

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Solution

The fourth proportional to 20,970.16, 28,950.76 and 13,906.12 is: 19,198.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.16 : 28,950.76 = 13,906.12 : x
  2. Step 2: Convert to fraction form
    20,970.16/28,950.76 = 13,906.12/x
  3. Step 3: Cross multiply
    20,970.16x = 28,950.76 × 13,906.12
  4. Step 4: Simplify right side
    20,970.16x = 402,592,742.65
  5. Step 5: Solve for x
    x = 402,592,742.65/20,970.16
  6. Step 6: Final answer
    x = 19,198.36

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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.