Home / 39,325.85-54,270.30-21,421.20

Finding the Fourth Proportional to 39,325.85, 54,270.30 and 21,421.20

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Solution

The fourth proportional to 39,325.85, 54,270.30 and 21,421.20 is: 29,561.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,325.85 : 54,270.30 = 21,421.20 : x
  2. Step 2: Convert to fraction form
    39,325.85/54,270.30 = 21,421.20/x
  3. Step 3: Cross multiply
    39,325.85x = 54,270.30 × 21,421.20
  4. Step 4: Simplify right side
    39,325.85x = 1,162,534,950.36
  5. Step 5: Solve for x
    x = 1,162,534,950.36/39,325.85
  6. Step 6: Final answer
    x = 29,561.60

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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.