Home / 53,143.08-79,718.73-21,538.09

Finding the Fourth Proportional to 53,143.08, 79,718.73 and 21,538.09

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Solution

The fourth proportional to 53,143.08, 79,718.73 and 21,538.09 is: 32,308.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,143.08 : 79,718.73 = 21,538.09 : x
  2. Step 2: Convert to fraction form
    53,143.08/79,718.73 = 21,538.09/x
  3. Step 3: Cross multiply
    53,143.08x = 79,718.73 × 21,538.09
  4. Step 4: Simplify right side
    53,143.08x = 1,716,989,181.43
  5. Step 5: Solve for x
    x = 1,716,989,181.43/53,143.08
  6. Step 6: Final answer
    x = 32,308.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.