Home / 38,643.40-53,330.82-21,651.64

Finding the Fourth Proportional to 38,643.40, 53,330.82 and 21,651.64

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Solution

The fourth proportional to 38,643.40, 53,330.82 and 21,651.64 is: 29,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,643.40 : 53,330.82 = 21,651.64 : x
  2. Step 2: Convert to fraction form
    38,643.40/53,330.82 = 21,651.64/x
  3. Step 3: Cross multiply
    38,643.40x = 53,330.82 × 21,651.64
  4. Step 4: Simplify right side
    38,643.40x = 1,154,699,715.54
  5. Step 5: Solve for x
    x = 1,154,699,715.54/38,643.40
  6. Step 6: Final answer
    x = 29,880.90

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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.