Home / 39,894.14-55,051.41-21,988.16

Finding the Fourth Proportional to 39,894.14, 55,051.41 and 21,988.16

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Solution

The fourth proportional to 39,894.14, 55,051.41 and 21,988.16 is: 30,342.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,894.14 : 55,051.41 = 21,988.16 : x
  2. Step 2: Convert to fraction form
    39,894.14/55,051.41 = 21,988.16/x
  3. Step 3: Cross multiply
    39,894.14x = 55,051.41 × 21,988.16
  4. Step 4: Simplify right side
    39,894.14x = 1,210,479,211.31
  5. Step 5: Solve for x
    x = 1,210,479,211.31/39,894.14
  6. Step 6: Final answer
    x = 30,342.28

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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.