Home / 21,007.47-28,980.63-13,450.17

Finding the Fourth Proportional to 21,007.47, 28,980.63 and 13,450.17

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Solution

The fourth proportional to 21,007.47, 28,980.63 and 13,450.17 is: 18,555.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.47 : 28,980.63 = 13,450.17 : x
  2. Step 2: Convert to fraction form
    21,007.47/28,980.63 = 13,450.17/x
  3. Step 3: Cross multiply
    21,007.47x = 28,980.63 × 13,450.17
  4. Step 4: Simplify right side
    21,007.47x = 389,794,400.21
  5. Step 5: Solve for x
    x = 389,794,400.21/21,007.47
  6. Step 6: Final answer
    x = 18,555.04

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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.