Home / 21,329.47-29,428.75-13,776.11

Finding the Fourth Proportional to 21,329.47, 29,428.75 and 13,776.11

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Solution

The fourth proportional to 21,329.47, 29,428.75 and 13,776.11 is: 19,007.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,329.47 : 29,428.75 = 13,776.11 : x
  2. Step 2: Convert to fraction form
    21,329.47/29,428.75 = 13,776.11/x
  3. Step 3: Cross multiply
    21,329.47x = 29,428.75 × 13,776.11
  4. Step 4: Simplify right side
    21,329.47x = 405,413,697.16
  5. Step 5: Solve for x
    x = 405,413,697.16/21,329.47
  6. Step 6: Final answer
    x = 19,007.21

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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.