Home / 39,647.95-54,715.43-21,742.91

Finding the Fourth Proportional to 39,647.95, 54,715.43 and 21,742.91

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Solution

The fourth proportional to 39,647.95, 54,715.43 and 21,742.91 is: 30,005.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,647.95 : 54,715.43 = 21,742.91 : x
  2. Step 2: Convert to fraction form
    39,647.95/54,715.43 = 21,742.91/x
  3. Step 3: Cross multiply
    39,647.95x = 54,715.43 × 21,742.91
  4. Step 4: Simplify right side
    39,647.95x = 1,189,672,670.10
  5. Step 5: Solve for x
    x = 1,189,672,670.10/39,647.95
  6. Step 6: Final answer
    x = 30,005.91

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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.