Home / 38,869.07-53,629.80-21,870

Finding the Fourth Proportional to 38,869.07, 53,629.80 and 21,870

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Solution

The fourth proportional to 38,869.07, 53,629.80 and 21,870 is: 30,175.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,869.07 : 53,629.80 = 21,870 : x
  2. Step 2: Convert to fraction form
    38,869.07/53,629.80 = 21,870/x
  3. Step 3: Cross multiply
    38,869.07x = 53,629.80 × 21,870
  4. Step 4: Simplify right side
    38,869.07x = 1,172,883,643.99
  5. Step 5: Solve for x
    x = 1,172,883,643.99/38,869.07
  6. Step 6: Final answer
    x = 30,175.25

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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.