Home / 39,904.23-55,068.21-21,999.87

Finding the Fourth Proportional to 39,904.23, 55,068.21 and 21,999.87

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Solution

The fourth proportional to 39,904.23, 55,068.21 and 21,999.87 is: 30,360.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.23 : 55,068.21 = 21,999.87 : x
  2. Step 2: Convert to fraction form
    39,904.23/55,068.21 = 21,999.87/x
  3. Step 3: Cross multiply
    39,904.23x = 55,068.21 × 21,999.87
  4. Step 4: Simplify right side
    39,904.23x = 1,211,493,461.13
  5. Step 5: Solve for x
    x = 1,211,493,461.13/39,904.23
  6. Step 6: Final answer
    x = 30,360.03

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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.