Home / 39,899.93-55,061.21-21,996.60

Finding the Fourth Proportional to 39,899.93, 55,061.21 and 21,996.60

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Solution

The fourth proportional to 39,899.93, 55,061.21 and 21,996.60 is: 30,354.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,899.93 : 55,061.21 = 21,996.60 : x
  2. Step 2: Convert to fraction form
    39,899.93/55,061.21 = 21,996.60/x
  3. Step 3: Cross multiply
    39,899.93x = 55,061.21 × 21,996.60
  4. Step 4: Simplify right side
    39,899.93x = 1,211,159,411.89
  5. Step 5: Solve for x
    x = 1,211,159,411.89/39,899.93
  6. Step 6: Final answer
    x = 30,354.93

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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.