Home / 39,904.08-55,068.01-21,999.72

Finding the Fourth Proportional to 39,904.08, 55,068.01 and 21,999.72

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Solution

The fourth proportional to 39,904.08, 55,068.01 and 21,999.72 is: 30,359.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.08 : 55,068.01 = 21,999.72 : x
  2. Step 2: Convert to fraction form
    39,904.08/55,068.01 = 21,999.72/x
  3. Step 3: Cross multiply
    39,904.08x = 55,068.01 × 21,999.72
  4. Step 4: Simplify right side
    39,904.08x = 1,211,480,966.08
  5. Step 5: Solve for x
    x = 1,211,480,966.08/39,904.08
  6. Step 6: Final answer
    x = 30,359.83

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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.