Home / 38,642.68-53,328.88-21,645.90

Finding the Fourth Proportional to 38,642.68, 53,328.88 and 21,645.90

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Solution

The fourth proportional to 38,642.68, 53,328.88 and 21,645.90 is: 29,872.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,642.68 : 53,328.88 = 21,645.90 : x
  2. Step 2: Convert to fraction form
    38,642.68/53,328.88 = 21,645.90/x
  3. Step 3: Cross multiply
    38,642.68x = 53,328.88 × 21,645.90
  4. Step 4: Simplify right side
    38,642.68x = 1,154,351,603.59
  5. Step 5: Solve for x
    x = 1,154,351,603.59/38,642.68
  6. Step 6: Final answer
    x = 29,872.45

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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.