Home / 39,220.15-54,124.14-21,315.15

Finding the Fourth Proportional to 39,220.15, 54,124.14 and 21,315.15

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Solution

The fourth proportional to 39,220.15, 54,124.14 and 21,315.15 is: 29,415.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.15 : 54,124.14 = 21,315.15 : x
  2. Step 2: Convert to fraction form
    39,220.15/54,124.14 = 21,315.15/x
  3. Step 3: Cross multiply
    39,220.15x = 54,124.14 × 21,315.15
  4. Step 4: Simplify right side
    39,220.15x = 1,153,664,162.72
  5. Step 5: Solve for x
    x = 1,153,664,162.72/39,220.15
  6. Step 6: Final answer
    x = 29,415.09

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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.