Home / 21,542.87-29,709.10-13,981.12

Finding the Fourth Proportional to 21,542.87, 29,709.10 and 13,981.12

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Solution

The fourth proportional to 21,542.87, 29,709.10 and 13,981.12 is: 19,280.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,542.87 : 29,709.10 = 13,981.12 : x
  2. Step 2: Convert to fraction form
    21,542.87/29,709.10 = 13,981.12/x
  3. Step 3: Cross multiply
    21,542.87x = 29,709.10 × 13,981.12
  4. Step 4: Simplify right side
    21,542.87x = 415,366,492.19
  5. Step 5: Solve for x
    x = 415,366,492.19/21,542.87
  6. Step 6: Final answer
    x = 19,280.93

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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.