Home / 39,904.95-55,068.96-21,999.60

Finding the Fourth Proportional to 39,904.95, 55,068.96 and 21,999.60

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Solution

The fourth proportional to 39,904.95, 55,068.96 and 21,999.60 is: 30,359.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,904.95 : 55,068.96 = 21,999.60 : x
  2. Step 2: Convert to fraction form
    39,904.95/55,068.96 = 21,999.60/x
  3. Step 3: Cross multiply
    39,904.95x = 55,068.96 × 21,999.60
  4. Step 4: Simplify right side
    39,904.95x = 1,211,495,174.91
  5. Step 5: Solve for x
    x = 1,211,495,174.91/39,904.95
  6. Step 6: Final answer
    x = 30,359.52

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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.