Home / 39,220.10-54,124.08-21,315.12

Finding the Fourth Proportional to 39,220.10, 54,124.08 and 21,315.12

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Solution

The fourth proportional to 39,220.10, 54,124.08 and 21,315.12 is: 29,415.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.10 : 54,124.08 = 21,315.12 : x
  2. Step 2: Convert to fraction form
    39,220.10/54,124.08 = 21,315.12/x
  3. Step 3: Cross multiply
    39,220.10x = 54,124.08 × 21,315.12
  4. Step 4: Simplify right side
    39,220.10x = 1,153,661,097.09
  5. Step 5: Solve for x
    x = 1,153,661,097.09/39,220.10
  6. Step 6: Final answer
    x = 29,415.05

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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.