Home / 20,420,870.13-28,179,980.80-11,128,242.13

Finding the Fourth Proportional to 20,420,870.13, 28,179,980.80 and 11,128,242.13

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Solution

The fourth proportional to 20,420,870.13, 28,179,980.80 and 11,128,242.13 is: 15,356,527.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420,870.13 : 28,179,980.80 = 11,128,242.13 : x
  2. Step 2: Convert to fraction form
    20,420,870.13/28,179,980.80 = 11,128,242.13/x
  3. Step 3: Cross multiply
    20,420,870.13x = 28,179,980.80 × 11,128,242.13
  4. Step 4: Simplify right side
    20,420,870.13x = 313,593,649,561,151.12
  5. Step 5: Solve for x
    x = 313,593,649,561,151.12/20,420,870.13
  6. Step 6: Final answer
    x = 15,356,527.30

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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.