Home / 38,638.45-53,322.38-21,643.42

Finding the Fourth Proportional to 38,638.45, 53,322.38 and 21,643.42

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Solution

The fourth proportional to 38,638.45, 53,322.38 and 21,643.42 is: 29,868.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,638.45 : 53,322.38 = 21,643.42 : x
  2. Step 2: Convert to fraction form
    38,638.45/53,322.38 = 21,643.42/x
  3. Step 3: Cross multiply
    38,638.45x = 53,322.38 × 21,643.42
  4. Step 4: Simplify right side
    38,638.45x = 1,154,078,290.91
  5. Step 5: Solve for x
    x = 1,154,078,290.91/38,638.45
  6. Step 6: Final answer
    x = 29,868.65

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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.