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Finding the Fourth Proportional to 38,854.84, 53,619.59 and 21,859.09

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Solution

The fourth proportional to 38,854.84, 53,619.59 and 21,859.09 is: 30,165.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,854.84 : 53,619.59 = 21,859.09 : x
  2. Step 2: Convert to fraction form
    38,854.84/53,619.59 = 21,859.09/x
  3. Step 3: Cross multiply
    38,854.84x = 53,619.59 × 21,859.09
  4. Step 4: Simplify right side
    38,854.84x = 1,172,075,066.18
  5. Step 5: Solve for x
    x = 1,172,075,066.18/38,854.84
  6. Step 6: Final answer
    x = 30,165.49

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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.