Home / 39,861.72-55,009.08-21,957.93

Finding the Fourth Proportional to 39,861.72, 55,009.08 and 21,957.93

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Solution

The fourth proportional to 39,861.72, 55,009.08 and 21,957.93 is: 30,301.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.72 : 55,009.08 = 21,957.93 : x
  2. Step 2: Convert to fraction form
    39,861.72/55,009.08 = 21,957.93/x
  3. Step 3: Cross multiply
    39,861.72x = 55,009.08 × 21,957.93
  4. Step 4: Simplify right side
    39,861.72x = 1,207,885,528.00
  5. Step 5: Solve for x
    x = 1,207,885,528.00/39,861.72
  6. Step 6: Final answer
    x = 30,301.89

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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.