Home / 13,999.79-21,003.79-4,139.32

Finding the Fourth Proportional to 13,999.79, 21,003.79 and 4,139.32

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Solution

The fourth proportional to 13,999.79, 21,003.79 and 4,139.32 is: 6,210.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.79 : 21,003.79 = 4,139.32 : x
  2. Step 2: Convert to fraction form
    13,999.79/21,003.79 = 4,139.32/x
  3. Step 3: Cross multiply
    13,999.79x = 21,003.79 × 4,139.32
  4. Step 4: Simplify right side
    13,999.79x = 86,941,487.79
  5. Step 5: Solve for x
    x = 86,941,487.79/13,999.79
  6. Step 6: Final answer
    x = 6,210.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.