Home / 39,428.63-54,409.43-21,520.16

Finding the Fourth Proportional to 39,428.63, 54,409.43 and 21,520.16

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Solution

The fourth proportional to 39,428.63, 54,409.43 and 21,520.16 is: 29,696.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,428.63 : 54,409.43 = 21,520.16 : x
  2. Step 2: Convert to fraction form
    39,428.63/54,409.43 = 21,520.16/x
  3. Step 3: Cross multiply
    39,428.63x = 54,409.43 × 21,520.16
  4. Step 4: Simplify right side
    39,428.63x = 1,170,899,639.11
  5. Step 5: Solve for x
    x = 1,170,899,639.11/39,428.63
  6. Step 6: Final answer
    x = 29,696.69

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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.