Home / 39,210.81-54,111.08-21,305.88

Finding the Fourth Proportional to 39,210.81, 54,111.08 and 21,305.88

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Solution

The fourth proportional to 39,210.81, 54,111.08 and 21,305.88 is: 29,402.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,210.81 : 54,111.08 = 21,305.88 : x
  2. Step 2: Convert to fraction form
    39,210.81/54,111.08 = 21,305.88/x
  3. Step 3: Cross multiply
    39,210.81x = 54,111.08 × 21,305.88
  4. Step 4: Simplify right side
    39,210.81x = 1,152,884,433.33
  5. Step 5: Solve for x
    x = 1,152,884,433.33/39,210.81
  6. Step 6: Final answer
    x = 29,402.21

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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.