Home / 39,415.20-54,391.95-21,510.42

Finding the Fourth Proportional to 39,415.20, 54,391.95 and 21,510.42

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Solution

The fourth proportional to 39,415.20, 54,391.95 and 21,510.42 is: 29,683.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,415.20 : 54,391.95 = 21,510.42 : x
  2. Step 2: Convert to fraction form
    39,415.20/54,391.95 = 21,510.42/x
  3. Step 3: Cross multiply
    39,415.20x = 54,391.95 × 21,510.42
  4. Step 4: Simplify right side
    39,415.20x = 1,169,993,689.12
  5. Step 5: Solve for x
    x = 1,169,993,689.12/39,415.20
  6. Step 6: Final answer
    x = 29,683.82

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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.