Home / 39,219.80-54,123.80-21,315.06

Finding the Fourth Proportional to 39,219.80, 54,123.80 and 21,315.06

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Solution

The fourth proportional to 39,219.80, 54,123.80 and 21,315.06 is: 29,415.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,219.80 : 54,123.80 = 21,315.06 : x
  2. Step 2: Convert to fraction form
    39,219.80/54,123.80 = 21,315.06/x
  3. Step 3: Cross multiply
    39,219.80x = 54,123.80 × 21,315.06
  4. Step 4: Simplify right side
    39,219.80x = 1,153,651,937.85
  5. Step 5: Solve for x
    x = 1,153,651,937.85/39,219.80
  6. Step 6: Final answer
    x = 29,415.04

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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.